CSC ivo://nasa.heasarc/csc NASA/GSFC HEASARC Evans, Civano 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The Chandra Source Catalog (CSC) is the definitive catalog of X-ray sources detected by the Chandra X-ray Observatory. By combining Chandra's sub-arcsecond on-axis spatial resolution and low instrumental background with consistent data processing, the CSC delivers a wide variety of uniformly calibrated properties and science ready data products for detected sources over four decades of flux. The Chandra Source Catalog version 2.1 (CSC 2.1) was released on April 2nd 2024; the current minor release is version 2.1.1, updated on 2024 October 18. (Refer to the <a href="https://cxc.cfa.harvard.edu/csc/versions.html">version history</a> for details.) This release of the catalog includes measured properties for 407,806 unique compact and extended X-ray sources in the sky, allowing statistical analysis of large samples, as well as individual source studies in the "Master Sources" table, provided herein. The extracted properties are provided for 1,304,376 individual observation detections, identified in Chandra ACIS and HRC-I imaging observations released publicly through the end of 2021, at the <a href="https://cxc.harvard.edu/csc/about.html">Chandra X-ray Center</a>. CSC 2.1.1 includes -- as an "alpha" release -- photometric properties for 1,717 highly extended (> ~30") sources, together with surface brightness polygons for several contour levels. The sensitivity limit for compact sources in CSC 2.1.1 is ~5 net counts, achieved by using a two-stage approach that involves co-adding multiple observations of the same field prior to source detection, and then using an optimized source detection method. For each X-ray detection and source, the catalog provides a detailed set of more than 100 tabulated positional, spatial, photometric, spectral, and temporal properties (each with associated lower and upper confidence intervals and measured in multiple energy bands). The catalog Bayesian aperture photometry code produces robust photometric probability density functions (PDFs), even in crowded fields and for low count detections. Releases beyond 2 use Bayesian Blocks analysis to identify multiple observations of the same source that have similar photometric properties, and these are analyzed simultaneously to improve S/N. The energy bands used to derive many of the CSC properties are defined in Table 4 of the reference paper: ultrasoft (u: 0.2-0.5 keV), soft (s: 0.5-1.2 keV), medium (m: 1.2-2.0 keV), hard (h: 2.0-7.0) and broad (b: 0.5-7.0 keV) for the ACIS energy bands, and wide (w: 0.1-10.0 keV) for the HRC energy band. The energy bands are chosen to optimize the detectability of X-ray sources while simultaneously maximizing the discrimination between different spectral shapes on X-ray color-color diagrams. Numerous source-specific catalog properties are evaluated within defined apertures. The authors define the "PSF 90% ECF aperture" for each source to be the ellipse that encloses 90% of the total counts in a model PSF centered on the source position. Because the size of the PSF is energy-dependent, the dimensions of the PSF 90% ECF aperture vary with energy band. They define the "source region aperture" for each source to be equal to the corresponding 3-sigma source region ellipse included in the merged source list, scaled by a factor of 1.5. Like the PSF 90% ECF aperture, the source region aperture is also centered on the source position, but the dimensions of the aperture are independent of energy band. This database table was last updated by the HEASARC in March 2025 and is based on a download of the online version of the Chandra Source Catalog, v2.1.1, at the CXC using the CLI. Refer to <a href="http://cxc.harvard.edu/csc/">http://cxc.harvard.edu/csc/</a> for details. This is a service provided by NASA HEASARC . 2024ApJS..274...22E https://heasarc.gsfc.nasa.gov/W3Browse/all/csc.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=csc& GET text/xml 180 99999 true 359.999948322013 0.725260934370568 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=csc GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_csc&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 X-ray public csc Chandra Source Catalog, v2.1.1 name Source Designation (2CXO JHHMMSS.SsDDMMSS[X]) meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable significance Highest Source Signal-to-Noise Ratio Across All Stacked Obs. and Energy Bands stat.snr double nullable b_flux_ap Net Energy Flux from Source Region Aperture, Bayesian Analysis; ACIS Broad Band erg/s/cm^2 phot.flux;src.net;em.X-ray double nullable b_flux_ap_hi Net Energy Flux from Source Region Aperture (68% Upper Limit); ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray float nullable b_flux_ap_lo Net Energy Flux from Source Region Aperture (68% Lower Limit); ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray float nullable m_flux_ap Net Energy Flux from Source Region Aperture, Bayesian Analysis; ACIS Medium erg/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable m_flux_ap_hi Net Energy Flux from Source Region Aperture (68% Upper Limit); ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium float nullable m_flux_ap_lo Net Energy Flux from Source Region Aperture (68% Lower Limit); ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium float nullable "__x_ra_dec" System unit vector column double nullable "__y_ra_dec" System unit vector column double nullable "__z_ra_dec" System unit vector column double nullable "__row" System index column char nullable u_flux_brems_ap90 PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung Model, ACIS Ultrasoft erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable brems_kt_hi Temperature (kT) of Best Bremsstrahlung Model Spectral Fit (68% Upper Limit) keV stat.error;phys.temperature;stat.fit.param;stat.max;meta.modelled double nullable m_major_axis_hi 1-Sigma Radius Along the Major Axis of Ellipse (68% Upper Limit); ACIS Medium arcsec stat.error;phys.angSize.smajAxis;stat.max;em.X-ray.medium float nullable u_photflux_ap90 Net Photon Flux from PSF 90% ECF Aperture, Bayesian Analysis; ACIS Ultrasoft photon/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable b_var_inter_prob Variability Probability, Calculated from Chi^2, in ACIS Broad Band stat.probability;src.var;em.X-ray double nullable h_flux_brems_ap_lo Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable u_photflux_ap_avg_hi Average Net Photon Flux from Source Region Aperture (68% Upper); ACIS Ultrasoft photon/s/cm^2 stat.error;phot.flux;src.net;stat.max double nullable w_flux_plaw_ap90 PSF 90% ECF Aperture Model Energy Flux from Power Law Model for HRC Wide Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable h_var_intra_prob Intra-Observation Gregory-Loredo Variability Probability for ACIS Hard Band stat.probability;src.var;em.X-ray.medium double nullable w_minor_axis_hi 1-Sigma Radius Along the Minor Axis of Ellipse (68% Upper Limit); HRC Wide Band arcsec stat.error;phys.angSize.sminAxis;stat.max;em.X-ray float nullable b_flux_ap_avg_hi Average Net Energy Flux from Source Region Aperture (68% Upper); ACIS Broad erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray double nullable h_flux_ap90_avg Average Net Energy Flux from PSF 90% ECF Aperture in ACIS Hard Band erg/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable u_major_axis_hi 1-Sigma Radius Along the Major Axis of Ellipse (68% Upper Limit); ACIS Ultrasoft arcsec stat.error;phys.angSize.smajAxis;stat.max;em.X-ray.soft float nullable u_photflux_ap_lo Net Photon Flux from Source Region Aperture (68% Lower Limit); ACIS Ultrasoft photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft double nullable h_var_inter_prob Variability Probability, Calculated from Chi^2, in ACIS Hard Band stat.probability;src.var;em.X-ray.medium double nullable s_position_angle Position Angle of Major Axis of Ellipse of Source Extent; ACIS Soft Band degree pos.posAng;em.X-ray.soft float nullable b_flux_ap90_avg_hi Average Net Energy Flux from PSF 90% ECF Aperture (68% Upper); ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray double nullable error_ellipse_r1 Minor Radius of the 95% Confidence Level Position Error Ellipse arcsec phys.angSize.sminAxis;pos.errorEllipse double nullable sat_src_flag Flag Indicates Source Saturated in All Observations meta.code.qual;instr.saturation char nullable s_flux_ap90_avg_hi Average Net Energy Flux from PSF 90% ECF Aperture (68% Upper); ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft double nullable flux_bb_hi Net Integrated 0.5-7.0 keV Energy Flux of Best Black Body Fit (68% Upper Limit) erg/s/cm^2 phot.flux;src.net;em.X-ray;meta.modelled;stat.max double nullable w_major_axis 1-Sigma Radius Along the Major Axis of Ellipse of Source Extent; HRC Wide Band arcsec phys.angSize.smajAxis;em.X-ray float nullable m_photflux_ap_avg_hi Average Net Photon Flux from Source Region Aperture (68% Upper); ACIS Medium photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium double nullable b_minor_axis_hi 1-Sigma Radius Along the Minor Axis of Ellipse (68% Upper Limit); ACIS Broad arcsec stat.error;phys.angSize.sminAxis;stat.max;em.X-ray float nullable u_flux_bb_ap_lo Source Region Aperture Model Energy Flux from Black Body Model, ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable h_flux_ap_avg Average Net Energy Flux from Source Region Aperture; ACIS Hard Band erg/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable brems_kt_rhat Temperature (kT) Convergence Criterion of Best Bremsstrahlung Model Spectral Fit phys.temperature;stat.fit.param;meta.modelled double nullable m_minor_axis_lo 1-Sigma Radius Along the Minor Axis of Ellipse (68% Lower Limit); ACIS Medium arcsec stat.error;phys.angSize.sminAxis;stat.min;em.X-ray.medium float nullable u_position_angle_lo Position Angle of Major Axis of Ellipse (68% Lower Limit); ACIS Ultrasoft Band degree stat.error;pos.posAng;stat.min;em.X-ray.soft float nullable m_photflux_ap90_avg_hi Average Net Photon Flux from PSF 90% ECF Aperture (68% Upper); ACIS Medium Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium double nullable apec_kt_lo Temperature (kT) of Best APEC Model Spectral Fit (68% Lower Confidence Limit) keV phys.temperature;stat.fit.param;stat.min;meta.modelled double nullable s_photflux_ap_avg_hi Average Net Photon Flux from Source Region Aperture (68% Upper); ACIS Soft Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft double nullable s_major_axis 1-Sigma Radius Along the Major Axis of Ellipse of Source Extent; ACIS Soft Band arcsec phys.angSize.smajAxis;em.X-ray.soft float nullable s_photflux_ap_lo Net Photon Flux from Source Region Aperture (68% Lower Limit); ACIS Soft Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft double nullable flux_apec_lo Net Integrated 0.5-7.0 keV Energy Flux of Best APEC Fit (68% Lower Conf. Limit) erg/s/cm^2 phot.flux;src.net;em.X-ray;stat.min;meta.modelled double nullable h_flux_ap_avg_lo Average Net Energy Flux from Source Region Aperture (68% Lower); ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium double nullable var_inter_hard_sigma_hs Inter-Observation ACIS Hard - Soft Hardness Ratio Variability Standard Deviation stat.stdev;arith;phot.flux double nullable w_src_area Area of the Source Extent Ellipse/Polygon; HRC Wide Band arcsec^2 phys.angArea;em.X-ray float nullable m_flux_plaw_ap Source Region Aperture Model Energy Flux from Power Law Model, ACIS Medium Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable w_flux_brems_ap_lo Source Region Aperture Model Energy Flux from Bremsstrahlung for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable b_position_angle_hi Position Angle of Major Axis of Ellipse (68% Upper Limit); ACIS Broad Band degree stat.error;pos.posAng;stat.max;em.X-ray float nullable brems_nh_lo Neutral Hydrogen Column Density of Best Bremsstrahlung Fit (68% Lower Limit) cm^-2 stat.error;phys.columnDensity;stat.fit.param;stat.min;meta.modelled double nullable w_major_axis_hi 1-Sigma Radius Along the Major Axis of Ellipse (68% Upper Limit); HRC Wide Band arcsec stat.error;phys.angSize.smajAxis;stat.max;em.X-ray float nullable h_flux_brems_ap90 PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung Model, ACIS Hard Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable m_flux_ap_avg Average Net Energy Flux from Source Region Aperture; ACIS Medium Band erg/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable s_flux_plaw_ap90 PSF 90% ECF Aperture Model Energy Flux from Power Law Model for ACIS Soft Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable w_var_intra_prob Intra-Observation Gregory-Loredo Variability Probability for HRC Wide Band stat.probability;src.var;em.X-ray double nullable conf_flag Flag Indicates Source Regions Overlap (Confused Source) meta.code char nullable s_position_angle_hi Position Angle of Major Axis of Ellipse (68% Upper Limit); ACIS Soft Band degree stat.error;pos.posAng;stat.max;em.X-ray.soft float nullable flux_apec_hi Net Integrated 0.5-7.0 keV Energy Flux of Best APEC Fit (68% Upper Conf. Limit) erg/s/cm^2 phot.flux;src.net;em.X-ray;meta.modelled;stat.max double nullable w_ks_intra_prob Intra-Obs. Kolmogorov-Smirnov Test Variability Probability for HRC Wide Band stat.probability;src.var;em.X-ray double nullable u_flux_brems_ap Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Ultrasoft erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable man_inc_flag Flag Indicates Source Was Manually Included in the Catalog via Human Review meta.code.qual char nullable w_flux_plaw_ap_hi Source Region Aperture Model Energy Flux from Power Law Model for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable m_flux_plaw_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Power Law Model for ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable dither_warning_flag Highest Peak in Source Region Count Rate Occurs at Dither (or a Beat) Frequency meta.code char nullable u_flux_ap_avg_lo Average Net Energy Flux from Source Region Aperture (68% Lower) ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft double nullable apec_z_rhat Redshift Convergence Criterion Redshift of Best APEC Model Spectral Fit src.redshift;stat.fit.param;meta.modelled double nullable h_flux_ap90_hi Net Energy Flux from PSF 90% ECF Aperture (68% Upper Limit); ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium double nullable apec_abund_lo Abundance of Best APEC Model Spectral Fit (68% Lower Confidence Limit) phys.abund;stat.fit.param;stat.min;meta.modelled double nullable var_inter_hard_prob_ms Inter-Observation ACIS Medium - Soft Hardness Ratio Variability Probability stat.probability;src.var double nullable streak_src_flag Flag Indicates Source Located on ACIS Readout Streak in All Observations meta.code.qual char nullable w_minor_axis 1-Sigma Radius Along the Minor Axis of Ellipse of Source Extent; HRC Wide Band arcsec phys.angSize.sminAxis;em.X-ray float nullable u_photflux_ap90_avg_hi Average Net Photon Flux from PSF 90% ECF Aperture (68% Upper); ACIS Ultrasoft photon/s/cm^2 stat.error;phot.flux;src.net;stat.max double nullable apec_nh_rhat Neutral Hydrogen Column Density Convergence Criterion of Best APEC Model Fit phys.columnDensity;stat.fit.param;meta.modelled double nullable u_flux_apec_ap90 PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Ultrasoft Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable b_flux_bb_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable b_position_angle_lo Position Angle of Major Axis of Ellipse (68% Lower Limit); ACIS Broad Band degree stat.error;pos.posAng;stat.min;em.X-ray float nullable h_photflux_ap90_avg_lo Average Net Photon Flux from PSF 90% ECF Aperture (68% Lower); ACIS Hard Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium double nullable b_ks_intra_prob Intra-Obs. Kolmogorov-Smirnov Test Variability Probability for ACIS Broad Band stat.probability;src.var;em.X-ray double nullable w_flux_apec_ap_hi Source Region Aperture Model Energy Flux from APEC Model for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable brems_norm_rhat Amplitude Convergence Criterion of Best Bremsstrahlung Model Spectral Fit stat.fit.param;meta.modelled double nullable m_flux_brems_ap Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Medium erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable s_photflux_ap90_hi Net Photon Flux from PSF 90% ECF Aperture (68% Upper Limit); ACIS Soft Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft float nullable m_flux_ap_avg_lo Average Net Energy Flux from Source Region Aperture (68% Lower); ACIS Medium erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium double nullable b_photflux_ap90 Net Photon Flux from PSF 90% ECF Aperture, Bayesian Analysis; ACIS Broad Band photon/s/cm^2 phot.flux;src.net;em.X-ray double nullable m_flux_ap90_avg_hi Average Net Energy Flux from PSF 90% ECF Aperture (68% Upper); ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium double nullable m_flux_brems_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung for ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable w_flux_plaw_ap Source Region Aperture Model Energy Flux from Power Law Model for HRC Wide Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable u_major_axis 1-Sigma Radius Along the Major Axis of Ellipse of Source Extent; ACIS Ultrasoft arcsec phys.angSize.smajAxis;em.X-ray.soft float nullable w_flux_ap_lo Net Energy Flux from Source Region Aperture (68% Lower Limit); HRC Wide Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray float nullable b_major_axis_hi 1-Sigma Radius Along the Major Axis of Ellipse (68% Upper Limit); ACIS Broad arcsec stat.error;phys.angSize.smajAxis;stat.max;em.X-ray float nullable powlaw_ampl_rhat Amplitude Convergence Criterion of Best Power-Law Model Spectral Fit stat.fit.param;meta.modelled double nullable brems_kt_lo Temperature (kT) of Best Bremsstrahlung Model Spectral Fit (68% Lower Limit) keV stat.error;phys.temperature;stat.fit.param;stat.min;meta.modelled double nullable m_ks_intra_prob Intra-Obs. Kolmogorov-Smirnov Test Variability Probability for ACIS Medium Band stat.probability;src.var;em.X-ray.medium double nullable powlaw_gamma_hi Photon Index of Best Power-Law Model Spectral Fit (68% Upper Confidence Limit) stat.fit.param;stat.max;meta.modelled double nullable h_minor_axis_hi 1-Sigma Radius Along the Minor Axis of Ellipse (68% Upper Limit); ACIS Hard Band arcsec stat.error;phys.angSize.sminAxis;stat.max;em.X-ray.medium float nullable b_flux_plaw_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Power Law Model for ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable u_flux_brems_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung, ACIS Ultrasoft Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable error_ellipse_r0 Major Radius of the 95% Confidence Level Position Error Ellipse arcsec phys.angSize.smajAxis;pos.errorEllipse double nullable m_flux_apec_ap_lo Source Region Aperture Model Energy Flux from APEC Model for ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable var_inter_hard_prob_hm Inter-Obs. ACIS Hard - Medium Hardness Ratio Variability Probability stat.probability;src.var double nullable m_position_angle_hi Position Angle of Major Axis of Ellipse (68% Upper Limit); ACIS Medium Band degree stat.error;pos.posAng;stat.max;em.X-ray.medium float nullable s_photflux_ap_hi Net Photon Flux from Source Region Aperture (68% Upper Limit); ACIS Soft Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft double nullable h_flux_plaw_ap_hi Source Region Aperture Model Energy Flux from Power Law Model for ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable b_position_angle Position Angle of Major Axis of Ellipse of Source Extent; ACIS Broad Band degree pos.posAng;em.X-ray float nullable u_flux_ap_lo Net Energy Flux from Source Region Aperture (68% Lower Limit); ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft float nullable s_photflux_ap90_avg_lo Average Net Photon Flux from PSF 90% ECF Aperture (68% Lower); ACIS Soft Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft double nullable w_photflux_ap90_avg Average Net Photon Flux from PSF 90% ECF Aperture; HRC Wide Band photon/s/cm^2 phot.flux;src.net;em.X-ray double nullable u_photflux_ap90_avg Average Net Photon Flux from PSF 90% ECF Aperture; ACIS Ultrasoft Band photon/s/cm^2 phot.flux;src.net double nullable man_add_flag Flag Indicates Source Was Manually Added in the Catalog via Human Review meta.code.qual char nullable powlaw_ampl_lo Amplitude of Best Power-Law Model Spectral Fit (68% Lower Confidence Limit) stat.fit.param;stat.min;meta.modelled double nullable b_photflux_ap90_avg_hi Average Net Photon Flux from PSF 90% ECF Aperture (68% Upper); ACIS Broad Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray double nullable s_flux_bb_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable h_var_inter_index Variability Index Indicates Constant Source Region Photon Flux in ACIS Hard Band src.var.index;em.X-ray.medium short nullable h_flux_apec_ap90 PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Hard Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable h_minor_axis_lo 1-Sigma Radius Along the Minor Axis of Ellipse (68% Lower Limit); ACIS Hard Band arcsec stat.error;phys.angSize.sminAxis;stat.min;em.X-ray.medium float nullable m_flux_plaw_ap_hi Source Region Aperture Model Energy Flux from Power Law Model, ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable apec_nh_lo Neutral Hydrogen Column Density of Best APEC Model Fit (68% Lower Conf. Limit) cm^-2 stat.error;phys.columnDensity;stat.fit.param;stat.min;meta.modelled double nullable h_major_axis_hi 1-Sigma Radius Along the Major Axis of Ellipse (68% Upper Limit); ACIS Hard Band arcsec stat.error;phys.angSize.smajAxis;stat.max;em.X-ray.medium float nullable bb_ampl_hi Amplitude of Best Black Body Model Spectral Fit (68% upperer Confidence Limit) stat.fit.param;stat.max;meta.modelled double nullable w_flux_ap90_avg Average Net Energy Flux from PSF 90% ECF Aperture in HRC Wide Band erg/s/cm^2 phot.flux;src.net;em.X-ray double nullable u_photflux_ap Net Photon Flux from Source Region Aperture, Bayesian Analysis; ACIS Ultrasoft photon/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable m_photflux_ap90_lo Net Photon Flux from PSF 90% ECF Aperture (68% Lower Limit); ACIS Medium Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium float nullable b_flux_brems_ap90 PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung Model, ACIS Broad erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable h_photflux_ap_avg_lo Average Net Photon Flux from Source Region Aperture (68% Lower); ACIS Hard Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium double nullable hrc_letg_time Total Livetime for All HRC/LETG Observations Contributing to Master Source s time.duration;obs.exposure double nullable s_flux_ap_avg_lo Average Net Energy Flux from Source Region Aperture (68% Lower); ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft double nullable s_kp_intra_prob Intra-Observation Kuiper Test Variability Probability for ACIS Soft Band stat.probability;src.var;em.X-ray.soft double nullable m_flux_brems_ap_lo Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Medium erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable nh_gal Galactic Neutral Hydrogen Column Density in Direction of Source cm^-2 phys.columnDensity double nullable b_minor_axis_lo 1-Sigma Radius Along the Minor Axis of Ellipse (68% Lower Limit); ACIS Broad arcsec stat.error;phys.angSize.sminAxis;stat.min;em.X-ray float nullable w_flux_bb_ap_lo Source Region Aperture Model Energy Flux from Black Body Model for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable bb_kt_lo Temperature (kT) of Best Black Body Model Spectral Fit (68% Lower Limit) keV stat.error;phys.temperature;stat.fit.param;stat.min;meta.modelled double nullable b_var_intra_prob Intra-Observation Gregory-Loredo Variability Probability for ACIS Broad Band stat.probability;src.var;em.X-ray double nullable b_photflux_ap_avg_hi Average Net Photon Flux from Source Region Aperture (68% Upper); ACIS Broad Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray double nullable m_var_inter_sigma Flux Variability Standard Deviation (Weighted Mean) in ACIS Medium Band photon/s/cm^2 stat.stdev;arith;phot.flux;em.X-ray.medium double nullable hrc_time Total Livetime for All HRC Imaging Observations Contributing to Master Source s time.duration;obs.exposure double nullable w_flux_brems_ap Source Region Aperture Model Energy Flux from Bremsstrahlung for HRC Wide Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable m_flux_brems_ap_hi Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Medium erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable b_var_inter_index Variability Index Indicates Constant Source Photon Flux in ACIS Broad Band src.var.index;em.X-ray short nullable b_flux_apec_ap90_lo PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable powlaw_nh_rhat Neutral Hydrogen Column Density Convergence Criterion of Best Power-Law Fit phys.columnDensity;stat.fit.param;meta.modelled double nullable u_major_axis_lo 1-Sigma Radius Along the Major Axis of Ellipse (68% Lower Limit); ACIS Ultrasoft arcsec stat.error;phys.angSize.smajAxis;stat.min;em.X-ray.soft float nullable acis_hetg_time Total Livetime for All ACIS/HETG Observations Contributing to Master Source s time.duration;obs.exposure double nullable s_var_inter_sigma Flux Variability Standard Deviation (Weighted Mean) in ACIS Soft Band photon/s/cm^2 stat.stdev;arith;phot.flux;em.X-ray.soft double nullable u_flux_ap_avg_hi Average Net Energy Flux from Source Region Aperture (68% Upper); ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft double nullable m_photflux_ap_hi Net Photon Flux from Source Region Aperture (68% Upper Limit); ACIS Medium Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium double nullable m_var_inter_index Variability Index Indicates Constant Source Photon Flux in ACIS Medium Band src.var.index;em.X-ray.medium short nullable s_photflux_ap_avg_lo Average Net Photon Flux from Source Region Aperture (68% Lower); ACIS Soft Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft double nullable bii Galactic Latitude degree pos.galactic.lat double nullable s_flux_ap_lo Net Energy Flux from Source Region Aperture (68% Lower Limit); ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft float nullable h_photflux_ap_lo Net Photon Flux from Source Region Aperture (68% Lower Limit); ACIS Hard Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium double nullable h_flux_apec_ap90_hi PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable h_var_inter_sigma Flux Variability Standard Deviation (Weighted Mean) in ACIS Hard Band photon/s/cm^2 stat.stdev;arith;phot.flux;em.X-ray.medium double nullable w_photflux_ap90_hi Net Photon Flux from PSF 90% ECF Aperture (68% Upper Limit); HRC Wide Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray float nullable u_flux_ap_hi Net Energy Flux from Source Region Aperture (68% Upper Limit); ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft float nullable w_flux_bb_ap90 PSF 90% ECF Aperture Model Energy Flux from Black Body Model for HRC Wide Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable var_inter_hard_flag Flag Indicates Hardness Ratios Are Inconsistent Between Observations meta.code;src.var char nullable w_flux_bb_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Black Body Model for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable w_flux_ap_hi Net Energy Flux from Source Region Aperture (68% Upper Limit); HRC Wide Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray float nullable man_reg_flag Flag Indicates Source Region Parameters Were Manually Modified via Human Review meta.code.qual char nullable w_var_inter_sigma Flux Variability Standard Deviation (Weighted Mean) in HRC Wide Band photon/s/cm^2 stat.stdev;arith;phot.flux;em.X-ray double nullable brems_norm_lo Amplitude of Best Bremsstrahlung Model Spectral Fit (68% Lower Confidence Limit) stat.fit.param;stat.min;meta.modelled double nullable u_flux_plaw_ap90 PSF 90% ECF Aperture Model Energy Flux from Power Law Model for ACIS Ultrasoft erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable powlaw_nh_lo Neutral Hydrogen Column Density of Best Power-Law Model Fit (68% Lower Limit) cm^-2 stat.error;phys.columnDensity;stat.fit.param;stat.min;meta.modelled double nullable m_flux_apec_ap90_hi PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable u_flux_ap90_avg_lo Average Net Energy Flux from PSF 90% ECF Aperture (68% Lower); ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft double nullable w_minor_axis_lo 1-Sigma Radius Along the Minor Axis of Ellipse (68% Lower Limit); HRC Wide Band arcsec stat.error;phys.angSize.sminAxis;stat.min;em.X-ray float nullable s_major_axis_lo 1-Sigma Radius Along the Major Axis of Ellipse (68% Lower Limit); ACIS Soft Band arcsec stat.error;phys.angSize.smajAxis;stat.min;em.X-ray.soft float nullable m_major_axis_lo 1-Sigma Radius Along the Major Axis of Ellipse (68% Lower Limit); ACIS Medium arcsec stat.error;phys.angSize.smajAxis;stat.min;em.X-ray.medium float nullable h_flux_ap90_lo Net Energy Flux from PSF 90% ECF Aperture (68% Lower Limit); ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium double nullable s_ks_intra_prob Intra-Obs. Kolmogorov-Smirnov Test Variability Probability for ACIS Soft Band stat.probability;src.var;em.X-ray.soft double nullable u_photflux_ap90_avg_lo Average Net Photon Flux from PSF 90% ECF Aperture (68% Lower); ACIS Ultrasoft photon/s/cm^2 stat.error;phot.flux;src.net;stat.min double nullable u_photflux_ap90_hi Net Photon Flux from PSF 90% ECF Aperture (68% Upper Limit); ACIS Ultrasoft Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft float nullable apec_kt Temperature (kT) of Best APEC Model Spectral Fit keV phys.temperature;stat.fit.param;meta.modelled double nullable w_var_intra_index Gregory-Loredo Variability Index for HRC Wide Band src.var.index;em.X-ray short nullable h_flux_apec_ap_hi Source Region Aperture Model Energy Flux from APEC Model for ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable powlaw_nh_hi Neutral Hydrogen Column Density of Best Power-Law Model Fit (68% Upper Limit) cm^-2 stat.error;phys.columnDensity;stat.fit.param;stat.max;meta.modelled double nullable u_var_inter_index Variability Index Indicates Constant Source Photon Flux in ACIS Ultrasoft Band src.var.index;em.X-ray.soft short nullable h_flux_ap_lo Net Energy Flux from Source Region Aperture (68% Lower Limit); ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium float nullable apec_abund_hi Abundance of Best APEC Model Spectral Fit (68% Upper Confidence Limit) phys.abund;stat.fit.param;stat.max;meta.modelled double nullable s_photflux_ap90_avg Average Net Photon Flux from PSF 90% ECF Aperture; ACIS Soft Band photon/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable b_var_intra_index Gregory-Loredo Variability Index for ACIS Broad Band src.var.index;em.X-ray short nullable b_flux_bb_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable s_flux_ap90_avg Average Net Energy Flux from PSF 90% ECF Aperture in ACIS Soft Band erg/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable h_flux_plaw_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Power Law Model for ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable flux_brems Net Integrated 0.5-7.0 keV Energy Flux of Best Bremsstrahlung Model Spectral Fit erg/s/cm^2 phot.flux;src.net;em.X-ray;meta.modelled double nullable w_kp_intra_prob Intra-Observation Kuiper Test Variability Probability for HRC Wide Band stat.probability;src.var;em.X-ray double nullable h_flux_bb_ap_hi Source Region Aperture Model Energy Flux from Black Body Model for ACIS Hard erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable flux_brems_lo Net Integrated 0.5-7.0 keV Energy Flux of Best Bremsstrahlung Fit (68% Lower) erg/s/cm^2 phot.flux;src.net;em.X-ray;stat.min;meta.modelled double nullable h_minor_axis 1-Sigma Radius Along the Minor Axis of Ellipse of Source Extent; ACIS Hard Band arcsec phys.angSize.sminAxis;em.X-ray.medium float nullable brems_norm Amplitude of Best Bremsstrahlung Model Spectral Fit stat.fit.param;meta.modelled double nullable u_photflux_ap_avg_lo Average Net Photon Flux from Source Region Aperture (68% Lower); ACIS Ultrasoft photon/s/cm^2 stat.error;phot.flux;src.net;stat.min double nullable b_flux_plaw_ap_lo Source Region Aperture Model Energy Flux from Power Law Model for ACIS Broad erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable h_flux_brems_ap_hi Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable b_flux_brems_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung for ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable b_kp_intra_prob Intra-Observation Kuiper Test Variability Probability for ACIS Broad Band stat.probability;src.var;em.X-ray double nullable u_flux_ap90 Net Energy Flux from PSF 90% ECF Aperture, Bayesian Analysis; ACIS Ultrasoft erg/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable h_flux_bb_ap Source Region Aperture Model Energy Flux from Black Body Model for ACIS Hard erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable s_flux_ap Net Energy Flux from Source Region Aperture, Bayesian Analysis; ACIS Soft Band erg/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable s_flux_ap90_hi Net Energy Flux from PSF 90% ECF Aperture (68% Upper Limit); ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft double nullable apec_z Redshift of Best APEC Model Spectral Fit src.redshift;stat.fit.param;meta.modelled double nullable apec_abund Abundance of Best APEC Model Spectral Fit phys.abund;stat.fit.param;meta.modelled double nullable b_photflux_ap_hi Net Photon Flux from Source Region Aperture (68% Upper Limit); ACIS Broad Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray double nullable s_photflux_ap90_avg_hi Average Net Photon Flux from PSF 90% ECF Aperture (68% Upper); ACIS Soft Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft double nullable b_src_area Area of the Source Extent Ellipse/Polygon; ACIS Broad Band arcsec^2 phys.angArea;em.X-ray float nullable u_var_inter_prob Variability Probability, Calculated from Chi^2, in ACIS Ultrasoft Band stat.probability;src.var;em.X-ray.soft double nullable b_flux_ap_avg_lo Average Net Energy Flux from Source Region Aperture (68% Lower); ACIS Broad erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray double nullable w_photflux_ap_lo Net Photon Flux from Source Region Aperture (68% Lower Limit); HRC Wide Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray double nullable bb_ampl Amplitude of Best Black Body Model Spectral Fit stat.fit.param;meta.modelled double nullable m_flux_plaw_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Power Law Model for ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable w_photflux_ap_avg_lo Average Net Photon Flux from Source Region Aperture (68% Lower); HRC Wide Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray double nullable flux_plaw_hi Net Integrated 0.5-7.0 keV Energy Flux of Best Power-Law Fit (68% Upper Limit) erg/s/cm^2 phot.flux;src.net;em.X-ray;stat.max;meta.modelled double nullable s_flux_bb_ap90 PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Soft Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable h_flux_ap90_avg_lo Average Net Energy Flux from PSF 90% ECF Aperture (68% Lower); ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium double nullable w_photflux_ap_hi Net Photon Flux from Source Region Aperture (68% Upper Limit); HRC Wide Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray double nullable s_flux_ap90_lo Net Energy Flux from PSF 90% ECF Aperture (68% Lower Limit); ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft double nullable b_photflux_ap_lo Net Photon Flux from Source Region Aperture (68% Lower Limit); ACIS Broad Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray double nullable s_flux_ap_avg Average Net Energy Flux from Source Region Aperture; ACIS Soft Band erg/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable u_flux_plaw_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Power Law Model, ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable w_major_axis_lo 1-Sigma Radius Along the Major Axis of Ellipse (68% Lower Limit); HRC Wide Band arcsec stat.error;phys.angSize.smajAxis;stat.min;em.X-ray float nullable h_flux_ap90_avg_hi Average Net Energy Flux from PSF 90% ECF Aperture (68% Upper); ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium double nullable powlaw_ampl_hi Amplitude of Best Power-Law Model Spectral Fit (68% upperer Confidence Limit) stat.fit.param;stat.max;meta.modelled double nullable h_flux_ap Net Energy Flux from Source Region Aperture, Bayesian Analysis; ACIS Hard Band erg/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable powlaw_ampl Amplitude of Best Power-Law Model Spectral Fit stat.fit.param;meta.modelled double nullable w_position_angle Position Angle of Major Axis of Ellipse of Source Extent; HRC Wide Band degree pos.posAng;em.X-ray float nullable b_flux_ap90_avg_lo Average Net Energy Flux from PSF 90% ECF Aperture (68% Lower); ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray double nullable s_minor_axis_hi 1-Sigma Radius Along the Minor Axis of Ellipse (68% Upper Limit); ACIS Soft Band arcsec stat.error;phys.angSize.sminAxis;stat.max;em.X-ray.soft float nullable h_position_angle_hi Position Angle of Major Axis of Ellipse (68% Upper Limit); ACIS Hard Band degree stat.error;pos.posAng;stat.max;em.X-ray.medium float nullable w_flux_ap90_hi Net Energy Flux from PSF 90% ECF Aperture (68% Upper Limit); HRC Wide Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray double nullable brems_norm_hi Amplitude of Best Bremsstrahlung Model Spectral Fit (68% upperer Conf. Limit) stat.fit.param;stat.max;meta.modelled double nullable s_flux_ap90 Net Energy Flux from PSF 90% ECF Aperture, Bayesian Analysis; ACIS Soft Band erg/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable lii Galactic Longitude degree pos.galactic.lon double nullable w_flux_ap90_avg_lo Average Net Energy Flux from PSF 90% ECF Aperture (68% Lower); HRC Wide Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray double nullable apec_norm_lo Amplitude of Best APEC Model Spectral Fit (68% Lower Confidence Limit) stat.fit.param;stat.min;meta.modelled double nullable m_flux_plaw_ap_lo Source Region Aperture Model Energy Flux from Power Law Model for ACIS Medium erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable bb_ampl_rhat Amplitude Convergence Criterion of Best Black Body Model Spectral Fit stat.fit.param;meta.modelled double nullable b_flux_bb_ap_hi Source Region Aperture Model Energy Flux from Black Body Model for ACIS Broad erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable s_photflux_ap_avg Average Net Photon Flux from Source Region Aperture; ACIS Soft Band photon/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable s_position_angle_lo Position Angle of Major Axis of Ellipse (68% Lower Limit); ACIS Soft Band degree stat.error;pos.posAng;stat.min;em.X-ray.soft float nullable m_flux_brems_ap90 PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung Model, ACIS Medium erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable h_flux_brems_ap Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Hard Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable m_photflux_ap_avg Average Net Photon Flux from Source Region Aperture; ACIS Medium Band photon/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable h_flux_apec_ap90_lo PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable w_photflux_ap_avg_hi Average Net Photon Flux from Source Region Aperture (68% Upper); HRC Wide Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray double nullable m_kp_intra_prob Intra-Observation Kuiper Test Variability Probability for ACIS Medium Band stat.probability;src.var;em.X-ray.medium double nullable flux_bb_lo Net Integrated 0.5-7.0 keV Energy Flux of Best Black Body Fit (68% Lower Limit) erg/s/cm^2 phot.flux;src.net;em.X-ray;stat.min;meta.modelled double nullable m_flux_brems_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung for ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable m_flux_ap_avg_hi Average Net Energy Flux from Source Region Aperture (68% Upper); ACIS Medium erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium double nullable w_flux_brems_ap90 PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung for HRC Wide Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable s_flux_brems_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable powlaw_gamma Photon Index of Best Power-Law Model Spectral Fit stat.fit.param;meta.modelled double nullable w_flux_bb_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Black Body Model for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable apec_stat Chi^2 Statistic per Degree of Freedom of Best APEC Model Spectral Fit stat.fit.param;meta.modelled double nullable m_flux_ap90_hi Net Energy Flux from PSF 90% ECF Aperture (68% Upper Limit); ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium double nullable m_flux_apec_ap90_lo PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable m_position_angle Position Angle of Major Axis of Ellipse of Source Extent; ACIS Medium Band degree pos.posAng;em.X-ray.medium float nullable flux_plaw_lo Net Integrated 0.5-7.0 keV Energy Flux of Best Power-Law Fit (68% Lower Limit) erg/s/cm^2 phot.flux;src.net;em.X-ray;stat.min;meta.modelled double nullable u_position_angle Position Angle of Major Axis of Ellipse of Source Extent; ACIS Ultrasoft Band degree pos.posAng;em.X-ray.soft float nullable w_flux_ap90_avg_hi Average Net Energy Flux from PSF 90% ECF Aperture (68% Upper); HRC Wide Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray double nullable h_photflux_ap90_lo Net Photon Flux from PSF 90% ECF Aperture (68% Lower Limit); ACIS Hard Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium float nullable w_photflux_ap90_lo Net Photon Flux from PSF 90% ECF Aperture (68% Lower Limit); HRC Wide Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray float nullable bb_kt_rhat Temperature (kT) Convergence Criterion of Best Black Body Model Spectral Fit phys.temperature;stat.fit.param;meta.modelled double nullable m_flux_ap90_avg_lo Average Net Energy Flux from PSF 90% ECF Aperture (68% Lower); ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium double nullable u_position_angle_hi Position Angle of Major Axis of Ellipse (68% Upper Limit); ACIS Ultrasoft Band degree stat.error;pos.posAng;stat.max;em.X-ray.soft float nullable s_flux_apec_ap_lo Source Region Aperture Model Energy Flux from APEC Model for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable u_photflux_ap_avg Average Net Photon Flux from Source Region Aperture; ACIS Ultrasoft Band photon/s/cm^2 phot.flux;src.net double nullable h_photflux_ap90_avg Average Net Photon Flux from PSF 90% ECF Aperture; ACIS Hard Band photon/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable s_flux_bb_ap_lo Source Region Aperture Model Energy Flux from Black Body Model for ACIS Soft erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable s_var_inter_prob Variability Probability, Calculated from Chi^2, in ACIS Soft Band stat.probability;src.var;em.X-ray.soft double nullable var_inter_hard_prob_hs Inter-Observation ACIS Hard - Soft Hardness Ratio Variability Probability stat.probability;src.var double nullable w_flux_ap_avg_lo Average Net Energy Flux from Source Region Aperture (68% Lower); HRC Wide Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray double nullable h_var_intra_index Gregory-Loredo Variability Index for ACIS Hard Band src.var.index;em.X-ray.medium short nullable apec_abund_rhat Abundance Convergence Criterion of Best APEC Model Spectral Fit phys.abund;stat.fit.param;meta.modelled double nullable b_flux_ap90_avg Average Net Energy Flux from PSF 90% ECF Aperture in ACIS Broad Band erg/s/cm^2 phot.flux;src.net;em.X-ray double nullable s_src_area Area of the Source Extent Ellipse/Polygon; ACIS Soft Band arcsec^2 phys.angArea;em.X-ray.soft float nullable s_flux_plaw_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Power Law Model for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable m_position_angle_lo Position Angle of Major Axis of Ellipse (68% Lower Limit); ACIS Medium Band degree stat.error;pos.posAng;stat.min;em.X-ray.medium float nullable apec_norm_rhat Amplitude Convergence Criterion of Best APEC Model Spectral Fit phys.columnDensity;stat.fit.param;meta.modelled double nullable m_flux_bb_ap Source Region Aperture Model Energy Flux from Black Body Model for ACIS Medium erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable h_photflux_ap90 Net Photon Flux from PSF 90% ECF Aperture, Bayesian Analysis; ACIS Hard Band photon/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable s_flux_plaw_ap_lo Source Region Aperture Model Energy Flux from Power Law Model for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable u_flux_ap90_lo Net Energy Flux from PSF 90% ECF Aperture (68% Lower Limit); ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft double nullable hrc_num Total Number of HRC Imaging Observations Contributing to Master Source Record meta.number short nullable likelihood Highest Detection Log Likelihood Across All Stacked Observations & Energy Bands stat.likelihood double nullable m_photflux_ap_avg_lo Average Net Photon Flux from Source Region Aperture (68% Lower); ACIS Medium photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium double nullable hrc_letg_num Total Number of HRC/LETG Observations Contributing to Master Source Record meta.number short nullable acis_num Total Number of ACIS Imaging Observations Contributing to Master Source Record meta.number short nullable b_flux_ap90_lo Net Energy Flux from PSF 90% ECF Aperture (68% Lower Limit); ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray double nullable s_flux_ap_hi Net Energy Flux from Source Region Aperture (68% Upper Limit); ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft float nullable flux_apec Net Integrated 0.5-7.0 keV Energy Flux of Best APEC Model Spectral Fit erg/s/cm^2 phot.flux;src.net;em.X-ray;meta.modelled double nullable b_flux_brems_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung for ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable w_flux_ap90 Net Energy Flux from PSF 90% ECF Aperture, Bayesian Analysis; HRC Wide Band erg/s/cm^2 phot.flux;src.net;em.X-ray double nullable m_flux_apec_ap Source Region Aperture Model Energy Flux from APEC Model for ACIS Medium Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable u_flux_ap90_avg Average Net Energy Flux from PSF 90% ECF Aperture in ACIS Ultrasoft Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable b_major_axis 1-Sigma Radius Along the Major Axis of Ellipse of Source Extent; ACIS Broad Band arcsec phys.angSize.smajAxis;em.X-ray float nullable brems_nh_rhat Neutral Hydrogen Column Density Convergence Criterion of Best Bremsstrahlung Fit phys.columnDensity;stat.fit.param;meta.modelled double nullable w_var_inter_index Variability Index Indicates Constant Source Region Photon Flux in HRC Wide Band src.var.index;em.X-ray short nullable s_flux_brems_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable s_flux_apec_ap Source Region Aperture Model Energy Flux from APEC Model for ACIS Soft Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable w_photflux_ap Net Photon Flux from Source Region Aperture, Bayesian Analysis; HRC Wide Band photon/s/cm^2 phot.flux;src.net;em.X-ray double nullable b_flux_plaw_ap_hi Source Region Aperture Model Energy Flux from Power Law Model, ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable w_flux_plaw_ap_lo Source Region Aperture Model Energy Flux from Power Law Model for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable s_flux_apec_ap90_hi PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable s_flux_bb_ap Source Region Aperture Model Energy Flux from Black Body Model for ACIS Soft erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable b_flux_apec_ap_hi Source Region Aperture Model Energy Flux from APEC Model for ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable w_flux_apec_ap90 PSF 90% ECF Aperture Model Energy Flux from APEC Model for HRC Wide Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable u_flux_apec_ap90_lo PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Ultrasoft Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable h_major_axis_lo 1-Sigma Radius Along the Major Axis of Ellipse (68% Lower Limit); ACIS Hard Band arcsec stat.error;phys.angSize.smajAxis;stat.min;em.X-ray.medium float nullable w_flux_apec_ap90_hi PSF 90% ECF Aperture Model Energy Flux from APEC Model for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable w_flux_apec_ap90_lo PSF 90% ECF Aperture Model Energy Flux from APEC Model for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable m_major_axis 1-Sigma Radius Along the Major Axis of Ellipse of Source Extent; ACIS Medium arcsec phys.angSize.smajAxis;em.X-ray.medium float nullable w_photflux_ap90 Net Photon Flux from PSF 90% ECF Aperture, Bayesian Analysis; HRC Wide Band photon/s/cm^2 phot.flux;src.net;em.X-ray double nullable b_flux_brems_ap Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Broad Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable s_flux_brems_ap Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Soft Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable s_var_intra_prob Intra-Observation Gregory-Loredo Variability Probability for ACIS Soft Band stat.probability;src.var;em.X-ray.soft double nullable man_match_flag Flag Indicates Source Detections Were Manually Matched via Human Review meta.code.qual char nullable u_flux_bb_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Black Body Model, ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable var_flag Flag Indicates Source Displays Flux Variability meta.code;src.var char nullable flux_plaw Net Integrated 0.5-7.0 keV Energy Flux of Best Power-Law Model Spectral Fit erg/s/cm^2 phot.flux;src.net;em.X-ray;meta.modelled double nullable b_photflux_ap_avg_lo Average Net Photon Flux from Source Region Aperture (68% Lower); ACIS Broad Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray double nullable m_photflux_ap90_avg Average Net Photon Flux from PSF 90% ECF Aperture; ACIS Medium Band photon/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable s_flux_bb_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable b_flux_apec_ap_lo Source Region Aperture Model Energy Flux from APEC Model for ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable u_photflux_ap_hi Net Photon Flux from Source Region Aperture (68% Upper Limit); ACIS Ultrasoft photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft double nullable w_flux_brems_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable h_flux_ap_hi Net Energy Flux from Source Region Aperture (68% Upper Limit); ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium float nullable hardness_ratio_hm ACIS Hard - Medium Band Hardness Ratio phot.color;em.X-ray double nullable apec_norm Amplitude of Best APEC Model Spectral Fit stat.fit.param;meta.modelled double nullable b_flux_plaw_ap90 PSF 90% ECF Aperture Model Energy Flux from Power Law Model for ACIS Broad Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable h_major_axis 1-Sigma Radius Along the Major Axis of Ellipse of Source Extent; ACIS Hard Band arcsec phys.angSize.smajAxis;em.X-ray.medium float nullable s_flux_brems_ap_lo Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable s_flux_plaw_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Power Law Model for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable u_flux_ap_avg Average Net Energy Flux from Source Region Aperture; ACIS Ultrasoft Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable b_flux_apec_ap90 PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Broad Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable m_src_area Area of the Source Extent Ellipse/Polygon; ACIS Medium Band arcsec^2 phys.angArea;em.X-ray.medium float nullable m_var_intra_index Gregory-Loredo Variability Index for ACIS Medium Band src.var.index;em.X-ray.medium short nullable s_photflux_ap Net Photon Flux from Source Region Aperture, Bayesian Analysis; ACIS Soft Band photon/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable acis_letg_time Total Livetime for All ACIS/LETG Observations Contributing to Master Source s time.duration;obs.exposure double nullable u_photflux_ap90_lo Net Photon Flux from PSF 90% ECF Aperture (68% Lower Limit); ACIS Ultrasoft Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft float nullable bb_ampl_lo Amplitude of Best Black Body Model Spectral Fit (68% Lower Confidence Limit) stat.fit.param;stat.min;meta.modelled double nullable b_flux_ap90 Net Energy Flux from PSF 90% ECF Aperture, Bayesian Analysis; ACIS Broad Band erg/s/cm^2 phot.flux;src.net;em.X-ray double nullable m_minor_axis_hi 1-Sigma Radius Along the Minor Axis of Ellipse (68% Upper Limit); ACIS Medium arcsec stat.error;phys.angSize.sminAxis;stat.max;em.X-ray.medium float nullable apec_nh Neutral Hydrogen Column Density of Best APEC Model Spectral Fit cm^-2 phys.columnDensity;stat.fit.param;meta.modelled double nullable b_flux_plaw_ap Source Region Aperture Model Energy Flux from Power Law Model, ACIS Broad Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable w_flux_ap Net Energy Flux from Source Region Aperture, Bayesian Analysis; HRC Wide Band erg/s/cm^2 phot.flux;src.net;em.X-ray double nullable w_position_angle_lo Position Angle of Major Axis of Ellipse (68% Lower Limit); HRC Wide Band degree stat.error;pos.posAng;stat.min;em.X-ray float nullable w_flux_bb_ap_hi Source Region Aperture Model Energy Flux from Black Body Model for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable h_flux_bb_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable m_minor_axis 1-Sigma Radius Along the Minor Axis of Ellipse of Source Extent; ACIS Medium arcsec phys.angSize.sminAxis;em.X-ray.medium float nullable h_flux_apec_ap Source Region Aperture Model Energy Flux from APEC Model for ACIS Hard Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable s_major_axis_hi 1-Sigma Radius Along the Major Axis of Ellipse (68% Upper Limit); ACIS Soft Band arcsec stat.error;phys.angSize.smajAxis;stat.max;em.X-ray.soft float nullable m_photflux_ap90_hi Net Photon Flux from PSF 90% ECF Aperture (68% Upper Limit); ACIS Medium Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium float nullable hardness_ratio_hm_lo ACIS Hard - Medium Hardness Ratio (68% Lower Confidence Limit) stat.error;phot.color;stat.min;em.X-ray double nullable flux_bb Net Integrated 0.5-7.0 keV Energy Flux of Best Black Body Model Spectral Fit erg/s/cm^2 phot.flux;src.net;em.X-ray;meta.modelled double nullable var_inter_hard_sigma_ms Inter-Observation ACIS Medium - Soft Hardness Ratio Variability Std. Deviation stat.stdev;arith;phot.flux double nullable man_pos_flag Flag Indicates Best-Fit Source Position Was Manually Modified via Human Review meta.code.qual char nullable hardness_ratio_hs ACIS Hard - Soft Hardness Ratio phot.color;em.X-ray double nullable m_flux_ap90_avg Average Net Energy Flux from PSF 90% ECF Aperture in ACIS Medium Band erg/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable u_flux_plaw_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Power Law Model, ACIS Ultrasoft Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable var_inter_hard_sigma_hm Inter-Obs. ACIS Hard - Medium Band Hardness Ratio Variability Standard Deviation stat.stdev;arith;phot.flux double nullable s_flux_apec_ap90 PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Soft Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable bb_nh Neutral Hydrogen Column Density of Best Black Body Model Spectral Fit cm^-2 phys.columnDensity;stat.fit.param;meta.modelled double nullable error_ellipse_angle Position Angle of the Major Axis of the 95% Confidence Level Error Ellipse degree pos.posAng;pos.errorEllipse double nullable h_flux_bb_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable h_flux_apec_ap_lo Source Region Aperture Model Energy Flux from APEC Model for ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable h_photflux_ap_avg Average Net Photon Flux from Source Region Aperture; ACIS Hard Band photon/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable u_flux_apec_ap_hi Source Region Aperture Model Energy Flux from APEC Model for ACIS Ultrasoft Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable b_photflux_ap90_avg_lo Average Net Photon Flux from PSF 90% ECF Aperture (68% Lower); ACIS Broad Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray double nullable hardness_ratio_ms_lo ACIS Medium - Soft Band Hardness Ratio (68% Lower Confidence Limit) stat.error;phot.color;stat.min;em.X-ray double nullable w_flux_ap_avg_hi Average Net Energy Flux from Source Region Aperture (68% Upper); HRC Wide Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray double nullable s_flux_apec_ap_hi Source Region Aperture Model Energy Flux from APEC Model for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable w_flux_ap90_lo Net Energy Flux from PSF 90% ECF Aperture (68% Lower Limit); HRC Wide Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray double nullable u_var_intra_index Gregory-Loredo Variability Index for ACIS Ultrasoft Band src.var.index;em.X-ray.soft short nullable w_flux_brems_ap_hi Source Region Aperture Model Energy Flux from Bremsstrahlung Model, HRC Wide erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable m_flux_bb_ap90 PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Medium erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable u_flux_bb_ap Source Region Aperture Model Energy Flux from Black Body Model, ACIS Ultrasoft erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable h_position_angle Position Angle of Major Axis of Ellipse of Source Extent; ACIS Hard Band degree pos.posAng;em.X-ray.medium float nullable bb_nh_rhat Neutral Hydrogen Column Density Convergence Criterion of Best Black Body Fit phys.columnDensity;stat.fit.param;meta.modelled double nullable h_flux_ap90 Net Energy Flux from PSF 90% ECF Aperture, Bayesian Analysis; ACIS Hard Band erg/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable s_flux_plaw_ap Source Region Aperture Model Energy Flux from Power Law Model for ACIS Soft Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable s_flux_ap_avg_hi Average Net Energy Flux from Source Region Aperture (68% Upper); ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft double nullable u_flux_apec_ap Source Region Aperture Model Energy Flux from APEC Model for ACIS Ultrasoft Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable b_photflux_ap90_avg Average Net Photon Flux from PSF 90% ECF Aperture; ACIS Broad Band photon/s/cm^2 phot.flux;src.net;em.X-ray double nullable h_photflux_ap90_hi Net Photon Flux from PSF 90% ECF Aperture (68% Upper Limit); ACIS Hard Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium float nullable u_flux_brems_ap_lo Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable w_photflux_ap_avg Average Net Photon Flux from Source Region Aperture; HRC Wide Band photon/s/cm^2 phot.flux;src.net;em.X-ray double nullable bb_stat Chi^2 Statistic per Degree of Freedom of Best Black Body Model Spectral Fit stat.fit.param;meta.modelled double nullable w_flux_plaw_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Power Law Model for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable m_flux_bb_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Medium erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable s_flux_plaw_ap_hi Source Region Aperture Model Energy Flux from Power Law Model for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable u_flux_brems_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung, ACIS Ultrasoft Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable b_flux_apec_ap90_hi PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable u_flux_plaw_ap_hi Source Region Aperture Model Energy Flux from Power Law Model, ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable m_flux_bb_ap_hi Source Region Aperture Model Energy Flux from Black Body Model for ACIS Medium erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable acis_letg_num Total Number of ACIS/LETG Observations Contributing to Master Source Record meta.number short nullable s_flux_apec_ap90_lo PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable m_photflux_ap90 Net Photon Flux from PSF 90% ECF Aperture, Bayesian Analysis; ACIS Medium Band photon/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable extent_flag Flag Indicates Source Extent Inconsistent with Point Source (90% Confidence) meta.code;phys.angSize char nullable m_flux_bb_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Medium erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable hardness_ratio_hs_lo ACIS Hard - Soft Hardness Ratio (68% Lower Confidence Limit) stat.error;phot.color;stat.min;em.X-ray double nullable b_flux_brems_ap_lo Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable h_src_area Area of the Source Extent Ellipse/Polygon; ACIS Hard Band arcsec^2 phys.angArea;em.X-ray.medium float nullable bb_kt_hi Temperature (kT) of Best Black Body Model Spectral Fit (68% Upper Limit) keV stat.error;phys.temperature;stat.fit.param;stat.max;meta.modelled double nullable w_flux_apec_ap Source Region Aperture Model Energy Flux from APEC Model for HRC Wide Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable w_position_angle_hi Position Angle of Major Axis of Ellipse (68% Upper Limit); HRC Wide Band degree stat.error;pos.posAng;stat.max;em.X-ray float nullable m_flux_apec_ap_hi Source Region Aperture Model Energy Flux from APEC Model for ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable h_flux_ap_avg_hi Average Net Energy Flux from Source Region Aperture (68% Upper); ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium double nullable b_var_inter_sigma Flux Variability Standard Deviation (Weighted Mean) in ACIS Broad Band photon/s/cm^2 stat.stdev;arith;phot.flux;em.X-ray double nullable h_flux_brems_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung for ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable u_flux_apec_ap_lo Source Region Aperture Model Energy Flux from APEC Model for ACIS Ultrasoft Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable b_flux_apec_ap Source Region Aperture Model Energy Flux from APEC Model for ACIS Broad Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable powlaw_nh Neutral Hydrogen Column Density of Best Power-Law Model Spectral Fit cm^-2 phys.columnDensity;stat.fit.param;meta.modelled double nullable w_flux_brems_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable m_var_intra_prob Intra-Observation Gregory-Loredo Variability Probability for ACIS Medium Band stat.probability;src.var;em.X-ray.medium double nullable h_flux_plaw_ap90 PSF 90% ECF Aperture Model Energy Flux from Power Law Model for ACIS Hard Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable acis_hetg_num Total Number of ACIS/HETG Observations Contributing to Master Source Record meta.number short nullable h_ks_intra_prob Intra-Obs. Kolmogorov-Smirnov Test Variability Probability for ACIS Hard Band stat.probability;src.var;em.X-ray.medium double nullable h_flux_brems_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung for ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.medium double nullable h_flux_bb_ap90 PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Hard Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable s_photflux_ap90_lo Net Photon Flux from PSF 90% ECF Aperture (68% Lower Limit); ACIS Soft Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft float nullable s_var_intra_index Gregory-Loredo Variability Index for ACIS Soft Band src.var.index;em.X-ray.soft short nullable b_photflux_ap90_hi Net Photon Flux from PSF 90% ECF Aperture (68% Upper Limit); ACIS Broad Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray float nullable b_major_axis_lo 1-Sigma Radius Along the Major Axis of Ellipse (68% Lower Limit); ACIS Broad arcsec stat.error;phys.angSize.smajAxis;stat.min;em.X-ray float nullable brems_nh Neutral Hydrogen Column Density of Best Bremsstrahlung Model Spectral Fit cm^-2 phys.columnDensity;stat.fit.param;meta.modelled double nullable b_flux_ap90_hi Net Energy Flux from PSF 90% ECF Aperture (68% Upper Limit); ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray double nullable brems_stat Chi^2 Statistic per Degree of Freedom of Best Bremsstrahlung Model Spectral Fit stat.fit.param;meta.modelled double nullable w_var_inter_prob Variability Probability, Calculated from Chi^2, in HRC Wide Band stat.probability;src.var;em.X-ray double nullable u_flux_plaw_ap Source Region Aperture Model Energy Flux from Power Law Model, ACIS Ultrasoft erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable m_photflux_ap90_avg_lo Average Net Photon Flux from PSF 90% ECF Aperture (68% Lower); ACIS Medium Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium double nullable apec_nh_hi Neutral Hydrogen Column Density of Best APEC Model Fit (68% Upper Conf. Limit) cm^-2 stat.error;phys.columnDensity;stat.fit.param;stat.max;meta.modelled double nullable u_minor_axis_lo 1-Sigma Radius Along the Minor Axis of Ellipse (68% Lower Limit); ACIS Ultrasoft arcsec stat.error;phys.angSize.sminAxis;stat.min;em.X-ray.soft float nullable bb_kt Temperature (kT) of Best Black Body Model Spectral Fit keV phys.temperature;stat.fit.param double nullable h_photflux_ap_avg_hi Average Net Photon Flux from Source Region Aperture (68% Upper); ACIS Hard Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium double nullable apec_kt_hi Temperature (kT) of Best APEC Model Spectral Fit (68% Upper Confidence Limit) keV phys.temperature;stat.fit.param;stat.max;meta.modelled double nullable b_flux_bb_ap90 PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Broad Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable bb_nh_lo Neutral Hydrogen Column Density of Best Black Body Fit (68% Lower Limit) cm^-2 stat.error;phys.columnDensity;stat.fit.param;stat.min;meta.modelled double nullable phot_nsrcs Number of Sources Fit Simultaneously to Compute Aperture Photometry Quantities meta.number;src short nullable m_var_inter_prob Variability Probability, Calculated from Chi^2, in ACIS Medium Band stat.probability;src.var;em.X-ray.medium double nullable u_flux_ap90_avg_hi Average Net Energy Flux from PSF 90% ECF Aperture (68% Upper); ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft double nullable hardness_ratio_ms_hi ACIS Medium - Soft Band Hardness Ratio (68% Upper Confidence Limit) stat.error;phot.color;stat.max;em.X-ray double nullable s_flux_ap90_avg_lo Average Net Energy Flux from PSF 90% ECF Aperture (68% Lower); ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.soft double nullable u_flux_ap90_hi Net Energy Flux from PSF 90% ECF Aperture (68% Upper Limit); ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.soft double nullable h_position_angle_lo Position Angle of Major Axis of Ellipse (68% Lower Limit); ACIS Hard Band degree stat.error;pos.posAng;stat.min;em.X-ray.medium float nullable h_flux_plaw_ap Source Region Aperture Model Energy Flux from Power Law Model for ACIS Hard Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable u_flux_bb_ap_hi Source Region Aperture Model Energy Flux from Black Body Model, ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable brems_kt Temperature (kT) of Best Bremsstrahlung Model Spectral Fit keV phys.temperature;stat.fit.param double nullable s_photflux_ap90 Net Photon Flux from PSF 90% ECF Aperture, Bayesian Analysis; ACIS Soft Band photon/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable m_photflux_ap Net Photon Flux from Source Region Aperture, Bayesian Analysis; ACIS Medium Band photon/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable h_flux_bb_ap_lo Source Region Aperture Model Energy Flux from Black Body Model for ACIS Hard erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable w_photflux_ap90_avg_hi Average Net Photon Flux from PSF 90% ECF Aperture (68% Upper); HRC Wide Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray double nullable powlaw_gamma_lo Photon Index of Best Power-Law Model Spectral Fit (68% Lower Confidence Limit) stat.fit.param;stat.min;meta.modelled double nullable w_flux_apec_ap_lo Source Region Aperture Model Energy Flux from APEC Model for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable apec_z_lo Redshift of Best APEC Model Spectral Fit (68% Lower Confidence Limit) src.redshift;stat.fit.param;stat.min;meta.modelled double nullable u_ks_intra_prob Intra-Obs. Kolmogorov-Smirnov Test Variability Prob. for ACIS Ultrasoft Band stat.probability;src.var;em.X-ray.soft double nullable u_var_intra_prob Intra-Observation Gregory-Loredo Variability Probability for ACIS Ultrasoft Band stat.probability;src.var;em.X-ray.soft double nullable u_src_area Area of the Source Extent Ellipse/Polygon; ACIS Ultrasoft Band arcsec^2 phys.angArea;em.X-ray.soft float nullable u_flux_bb_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable m_flux_apec_ap90 PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Medium Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable s_var_inter_index Variability Index Indicates Constant Source Region Photon Flux in ACIS Soft Band src.var.index;em.X-ray.soft short nullable u_minor_axis 1-Sigma Radius Along the Minor Axis of Ellipse of Source Extent; ACIS Ultrasoft arcsec phys.angSize.sminAxis;em.X-ray.soft float nullable b_minor_axis 1-Sigma Radius Along the Minor Axis of Ellipse of Extent; ACIS Broad Band arcsec phys.angSize.sminAxis;em.X-ray float nullable h_photflux_ap Net Photon Flux from Source Region Aperture, Bayesian Analysis; ACIS Hard Band photon/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable s_minor_axis_lo 1-Sigma Radius Along the Minor Axis of Ellipse (68% Lower Limit); ACIS Soft Band arcsec stat.error;phys.angSize.sminAxis;stat.min;em.X-ray.soft float nullable m_flux_plaw_ap90 PSF 90% ECF Aperture Model Energy Flux from Power Law Model for ACIS Medium Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.medium double nullable s_flux_brems_ap_hi Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable h_flux_plaw_ap90_lo PSF 90% ECF Aperture Model Energy Flux from Power Law Model for ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable bb_nh_hi Neutral Hydrogen Column Density of Best Black Body Fit (68% Upper Limit) cm^-2 stat.error;phys.columnDensity;stat.fit.param;stat.max;meta.modelled double nullable apec_z_hi Redshift of Best APEC Model Spectral Fit (68% Upper Confidence Limit) src.redshift;stat.fit.param;stat.max;meta.modelled double nullable hrc_hetg_num Total Number of HRC/HETG Observations Contributing to Master Source Record meta.number short nullable hrc_hetg_time Total Livetime for All HRC/HETG Observations Contributing to Master Source s time.duration;obs.exposure double nullable m_flux_ap90_lo Net Energy Flux from PSF 90% ECF Aperture (68% Lower Limit); ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium double nullable h_photflux_ap_hi Net Photon Flux from Source Region Aperture (68% Upper Limit); ACIS Hard Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium double nullable u_flux_plaw_ap_lo Source Region Aperture Model Energy Flux from Power Law Model, ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.soft double nullable b_photflux_ap_avg Average Net Photon Flux from Source Region Aperture; ACIS Broad Band photon/s/cm^2 phot.flux;src.net;em.X-ray double nullable m_photflux_ap_lo Net Photon Flux from Source Region Aperture (68% Lower Limit); ACIS Medium Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray.medium double nullable h_flux_plaw_ap_lo Source Region Aperture Model Energy Flux from Power Law Model, ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable apec_norm_hi Amplitude of Best APEC Model Spectral Fit (68% upperer Confidence Limit) stat.fit.param;stat.max;meta.modelled double nullable h_photflux_ap90_avg_hi Average Net Photon Flux from PSF 90% ECF Aperture (68% Upper); ACIS Hard Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.max;em.X-ray.medium double nullable b_flux_ap_avg Average Net Energy Flux from Source Region Aperture; ACIS Broad Band erg/s/cm^2 phot.flux;src.net;em.X-ray double nullable h_kp_intra_prob Intra-Observation Kuiper Test Variability Probability for ACIS Hard Band stat.probability;src.var;em.X-ray.medium double nullable acis_time Total Livetime for All ACIS Imaging Observations Contributing to Master Source s time.duration;obs.exposure double nullable u_flux_apec_ap90_hi PSF 90% ECF Aperture Model Energy Flux from APEC Model for ACIS Ultrasoft Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable m_flux_bb_ap_lo Source Region Aperture Model Energy Flux from Black Body Model for ACIS Medium erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray.medium double nullable b_photflux_ap Net Photon Flux from Source Region Aperture, Bayesian Analysis; ACIS Broad Band photon/s/cm^2 phot.flux;src.net;em.X-ray double nullable hardness_ratio_hs_hi ACIS Hard - Soft Hardness Ratio (68% Upper Confidence Limit) stat.error;phot.color;stat.max;em.X-ray double nullable s_flux_brems_ap90 PSF 90% ECF Aperture Model Energy Flux from Bremsstrahlung Model, ACIS Soft Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable b_flux_brems_ap_hi Source Region Aperture Model Energy Flux from Bremsstrahlung for ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable u_flux_ap Net Energy Flux from Source Region Aperture, Bayesian Analysis; ACIS Ultrasoft erg/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable u_var_inter_sigma Flux Variability Standard Deviation (Weighted Mean) in ACIS Ultrasoft Band photon/s/cm^2 stat.stdev;arith;phot.flux;em.X-ray.soft double nullable w_flux_bb_ap Source Region Aperture Model Energy Flux from Black Body Model for HRC Wide Band erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable b_flux_bb_ap Source Region Aperture Model Energy Flux from Black Body Model for ACIS Broad erg/s/cm^2 phot.flux;meta.modelled;em.X-ray double nullable s_minor_axis 1-Sigma Radius Along the Minor Axis of Ellipse of Source Extent; ACIS Soft Band arcsec phys.angSize.sminAxis;em.X-ray.soft float nullable u_flux_brems_ap_hi Source Region Aperture Model Energy Flux from Bremsstrahlung, ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable apec_kt_rhat Temperature (kT) Convergence Criterion of Best APEC Model Spectral Fit phys.temperature;stat.fit.param;meta.modelled double nullable hardness_ratio_hm_hi ACIS Hard - Medium Hardness Ratio (68% Upper Confidence Limit) stat.error;phot.color;stat.max;em.X-ray double nullable powlaw_gamma_rhat Photon Index Convergence Criterion of Best Power-Law Model Spectral Fit stat.fit.param;meta.modelled double nullable u_minor_axis_hi 1-Sigma Radius Along the Minor Axis of Ellipse (68% Upper Limit); ACIS Ultrasoft arcsec stat.error;phys.angSize.sminAxis;stat.max;em.X-ray.soft float nullable w_flux_ap_avg Average Net Energy Flux from Source Region Aperture; HRC Wide Band erg/s/cm^2 phot.flux;src.net;em.X-ray double nullable s_flux_bb_ap_hi Source Region Aperture Model Energy Flux from Black Body Model for ACIS Soft erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray.soft double nullable b_flux_plaw_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Power Law Model for ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable w_photflux_ap90_avg_lo Average Net Photon Flux from PSF 90% ECF Aperture (68% Lower); HRC Wide Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray double nullable pileup_flag Flag Indicates ACIS Pile-Up Fraction Exceeds ~10% in All Observations meta.code char nullable flux_brems_hi Net Integrated 0.5-7.0 keV Energy Flux of Best Bremsstrahlung Fit (68% Upper) erg/s/cm^2 phot.flux;src.net;em.X-ray;stat.max;meta.modelled double nullable u_flux_bb_ap90 PSF 90% ECF Aperture Model Energy Flux from Black Body Model for ACIS Ultrasoft erg/s/cm^2 phot.flux;meta.modelled;em.X-ray.soft double nullable w_flux_plaw_ap90_hi PSF 90% ECF Aperture Model Energy Flux from Power Law Model for HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.max;meta.modelled;em.X-ray double nullable brems_nh_hi Neutral Hydrogen Column Density of Best Bremsstrahlung Fit (68% Upper Limit) cm^-2 stat.error;phys.columnDensity;stat.fit.param;stat.max;meta.modelled double nullable likelihood_class Highest Detection Likelihood Classification Across All Stacked Obs. and Bands stat.likelihood char nullable powlaw_stat Chi^2 Statistic per Degree of Freedom of Best Power-Law Model Spectral Fit stat.fit.chi2;phys.columnDensity;stat.fit.param;meta.modelled double nullable hardness_ratio_ms ACIS Medium - Soft Band Hardness Ratio phot.color;em.X-ray double nullable u_kp_intra_prob Intra-Observation Kuiper Test Variability Probability for ACIS Ultrasoft Band stat.probability;src.var;em.X-ray.soft double nullable b_flux_bb_ap_lo Source Region Aperture Model Energy Flux from Black Body Model for ACIS Broad erg/s/cm^2 stat.error;phot.flux;stat.min;meta.modelled;em.X-ray double nullable m_flux_ap90 Net Energy Flux from PSF 90% ECF Aperture, Bayesian Analysis; ACIS Medium Band erg/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable b_photflux_ap90_lo Net Photon Flux from PSF 90% ECF Aperture (68% Lower Limit); ACIS Broad Band photon/s/cm^2 stat.error;phot.flux;src.net;stat.min;em.X-ray float nullable