CSCSTACK ivo://nasa.heasarc/cscstack 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's Stacked Observation Detections Table (CSCSTACK) includes 493,236 detections (855,402 total entries consisting of detections plus photometric upper limits) based on 10,034 stacks of X-ray observations. Exploiting the unique resolution and very low background of Chandra data, the limiting sensitivity of the catalog is enhanced significantly by stacking (co-adding) multiple observations of the same field prior to source detection. To minimize the impact of the variation in the Chandra point spread function (PSF) with off-axis angles, source detection is constrained to run on stacks of observations that have telescope pointings that are co-located within 60 arcseconds and that were obtained using the same instrument (ACIS or HRC-I). Formally, the observations are matched using a tree clustering algorithm with complete linkage. This means that the pointing direction of every observation in the stack is co-aligned with the pointing direction of every other observation in the stack within 60 arcseconds. The stacked-observation level allows composite properties to be reported from the co-added observations for detections that would otherwise not be visible or have poor S/N in individual observations, while for higher S/N detections the per-observation properties facilitate analysis of variable sources. CSCSTACK is related to the <a href="/W3Browse/chandra/csc.html">Chandra Source Catalog (CSC)</a> catalog, which is the definitive catalog of X-ray sources detected by the Chandra X-ray Observatory. The CSC contains 407,806 unique compact and extended X-ray sources. 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. Each identified distinct X-ray source on the sky is represented in the catalog by one or more "stack detection" entries -- one for each stack in which the source has been detected -- and a single "master source" entry. The individual stack entries record all of the properties about a detection extracted from a single stack, as well as associated file-based data products, which are stack-specific. If a source is detected in one or more stacked-observations, photometric upper limits that are useful for temporal variability analyses are calculated for any overlapping stacked- and individual-observations in which the source is not detected. This database table was ingested by the HEASARC in July 2026 and is based on a download of the online version of the "Stacked Observation Detections" Table v. 2.1.1, at the CXC using the CLI. Refer to <a href="https://cxc.harvard.edu/csc/cli/">https://cxc.harvard.edu/csc/cli/</a> for details. This is a service provided by NASA HEASARC . 2024ApJS..274...22E https://heasarc.gsfc.nasa.gov/W3Browse/all/cscstack.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=cscstack& GET text/xml 180 99999 true 0.0608542437141085 13.9256336699046 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=cscstack GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_cscstack&Action=More+Options&Action=Parameter+Search&ConeAdd=1 CHANDRA 0.0166666666666667 X-ray public cscstack Chandra Source Catalog Stacked Observation Detections, v2.1.1 detect_stack_id Detect Stack Identifier (Designation of Obs. Stack Used for Source Detection) meta.id;meta.main char nullable region_id Detection Region Identifier (Component Number) meta.id.part short nullable ra Right Ascension of Detection Position degree pos.eq.ra;meta.main double nullable dec Declination of Detection Position degree pos.eq.dec;meta.main double nullable b_detect_significance Significance of Detection in the ACIS Broad (0.5-7.0 keV) Energy Band stat.likelihood;phot.count;em.X-ray double nullable b_flux_significance Significance of Detection from Photon Flux in ACIS Broad (0.5-7.0 keV) Band stat.confidenceLevel;phot.flux;em.X-ray double nullable b_flux_ap Net Energy Flux from Source Region Aperture in ACIS Broad Band erg/s/cm^2 phot.flux;src.net;em.X-ray double nullable b_flux_ap_lo Lower Limit of Net Energy Flux from Source Region Aperture in ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray double nullable b_flux_ap_hi Upper Limit of Net Energy Flux from Source Region Aperture in ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray double nullable exposure Effective Stacked Observation Exposure Time s time.duration;obs.exposure double nullable s_detect_significance Significance of Detection in the ACIS Soft (0.5-1.2 keV) Energy Band stat.likelihood;phot.count;em.X-ray.soft double nullable w_position_angle_lo Lower Limit of Position Angle of Major Axis of Extent in HRC Wide Band degree stat.error;pos.posAng;stat.min;em.X-ray double nullable minor_axis1_apbkg Semi-Minor Axis of the Inner Ellipse of the Annular Background Region Aperture arcsec phys.angSize.sminAxis;instr.background double nullable s_ks_intra_prob Kolmogorov-Smirnov Test Variability Probability in ACIS Soft (0.5-1.2 keV) stat.probability;src.var;em.X-ray.soft double nullable s_count_rate_ap Net Count Rate from Source Region Aperture in ACIS Soft (0.5-1.2 keV) Band ct/s phot.count;em.X-ray.soft double nullable w_counts_ap90_hi Upper Limit of Net Counts from PSF 90% ECF Aperture for HRC Wide Energy Band ct stat.error;phot.count;stat.max;em.X-ray double nullable phot_nsrcs Number of Detections Fit to Compute Aperture Photometry Quantities meta.number;stat.value short nullable s_minor_axis_hi Upper Limit of Minor Axis of Extent in ACIS Soft (0.5-1.2 keV) Energy Band arcsec stat.error;phys.angSize.sminAxis;stat.max;em.X-ray.soft double nullable m_position_angle_hi Upper Limit of Position Angle of Major Axis of Extent in ACIS Medium Band degree stat.error;pos.posAng;stat.max;em.X-ray.medium double nullable u_flux_ap_hi Upper Limit of Net Energy Flux from Source Region Aperture in ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.soft double nullable w_photflux_ap Net Photon Flux from Source Region Aperture in HRC Wide Band photon/s/cm^2 phot.flux;src.net;em.X-ray double nullable u_photflux_ap90_lo Lower Limit of Net Photon Flux from PSF 90% ECF Aperture in ACIS Ultrasoft Band photon/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.soft double nullable var_inter_hard_ms_sigma Inter-Obs. ACIS Medium-Soft Photon Flux Hardness Ratio Variability Std. Dev. stat.stdev;arith;phot.flux double nullable w_var_inter_index Inter-Stacked Observation Variability Index for HRC Wide (~0.1-10.0 keV) Band src.var.index;em.X-ray short nullable u_counts_ap_hi Upper Limit of Net Counts in ACIS Ultrasoft (0.2-0.5 keV) Energy Band ct stat.error;phot.count;stat.max;em.X-ray.soft double nullable u_flux_significance Significance of Detection from Photon Flux in ACIS Ultrasoft (0.2-0.5 keV) Band stat.confidenceLevel;phot.flux;em.X-ray.soft double nullable u_minor_axis_lo Lower Limit of Minor Axis of Extent in ACIS Ultrasoft Band arcsec stat.error;phys.angSize.sminAxis;stat.min;em.X-ray.soft double nullable s_flux_ap_lo Lower Limit of Net Energy Flux from Source Region Aperture in ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.soft double nullable var_inter_hard_hs_prob Inter-Obs. ACIS Hard-Soft Photon Flux Hardness Ratio Variability Probability stat.probability;src.var double nullable b_flux_ap90_hi Upper Limit of Net Energy Flux from PSF 90% ECF Aperture in ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray double nullable dscale Sky Coordinate System Scale Factor Correction to Co-Align with Gaia-CRF3 degree arith.factor double nullable caldbver Calibration Database Version Used for the Level 3 Detect Stack Event Data File meta.version char nullable b_major_axis_hi Upper Limit of Major Axis of Extent in ACIS Broad (0.5-7.0 keV) Energy Band arcsec stat.error;phys.angSize.smajAxis;stat.max;em.X-ray double nullable s_flux_ap90_lo Lower Limit of Net Energy Flux from PSF 90% ECF Aperture in ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.soft double nullable w_flux_ap_hi Upper Limit of Net Energy Flux from Source Region Aperture in HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray double nullable position_angle_apbkg Position Angle of the Semi-Major Axes of the Annular Background Region Aperture degree pos.posAng;instr.background double nullable major_axis2_apbkg Semi-Major Axis of the Outer Ellipse of the Annular Background Region Aperture arcsec phys.angSize.smajAxis;instr.background double nullable u_count_rate_ap90_lo Lower Limit of Net Count Rate from PSF 90% ECF Aperture in ACIS Ultrasoft Band ct/s stat.error;phot.count;stat.min;em.X-ray.soft double nullable b_counts_ap90 Net Counts from PSF 90% ECF Aperture for ACIS Broad (0.5-7.0 keV) Energy Band ct phot.count;em.X-ray double nullable minor_axis_ap Semi-Minor Axis of the Elliptical Source Region Aperture arcsec phys.angSize.sminAxis double nullable b_counts_ap_hi Upper Limit of Net Counts in ACIS Broad (0.5-7.0 keV) Energy Band ct stat.error;phot.count;stat.max;em.X-ray 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 u_flux_ap90 Net Energy Flux from PSF 90% ECF Aperture in ACIS Ultrasoft Band erg/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable lii Galactic Longitude of Detection Position degree pos.galactic.lon double nullable s_count_rate_ap90 Net Count Rate from PSF 90% ECF Aperture in ACIS Soft Band ct/s phot.count;em.X-ray.soft double nullable b_position_angle_lo Lower Limit of Position Angle of Major Axis of Extent in ACIS Broad Band degree stat.error;pos.posAng;stat.min;em.X-ray double nullable h_flux_ap_lo Lower Limit of Net Energy Flux from Source Region Aperture in ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.medium double nullable b_src_area Area of the Deconvolved Detection Extent Ellipse or Polygon in ACIS Broad Band arcsec^2 phys.angArea;em.X-ray double nullable h_photflux_ap90_lo Lower Limit of Net Photon Flux from PSF 90% ECF Aperture in ACIS Hard Band photon/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.medium double nullable m_photflux_ap_hi Upper Limit of Net Photon Flux from Source Region Aperture in ACIS Medium Band photon/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.medium double nullable w_photflux_ap90 Net Photon Flux from PSF 90% ECF Aperture in HRC Wide Band photon/s/cm^2 phot.flux;src.net;em.X-ray double nullable extent_code Code Indicates Detection Is Extended (Bit Encoded) meta.code;phys.angSize short nullable b_counts_ap90_hi Upper Limit of Net Counts from PSF 90% ECF Aperture for ACIS Broad Energy Band ct stat.error;phot.count;stat.max;em.X-ray double nullable s_photflux_ap90_lo Lower Limit of Net Photon Flux from PSF 90% ECF Aperture in ACIS Soft Band photon/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.soft double nullable m_photflux_ap90 Net Photon Flux from PSF 90% ECF Aperture in ACIS Medium Band photon/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable h_major_axis 1-Sigma Radius Along Major Axis of Extent in ACIS Hard Band arcsec phys.angSize.smajAxis;em.X-ray.medium double nullable b_count_rate_ap Net Count Rate from Source Region Aperture in ACIS Broad (0.5-7.0 keV) Band ct/s phot.count;em.X-ray double nullable m_flux_significance Significance of Detection from Photon Flux in ACIS Medium (1.2-2.0 keV) Band stat.confidenceLevel;phot.flux;em.X-ray.medium double nullable s_major_axis_hi Upper Limit of Major Axis of Extent in ACIS Soft (0.5-1.2 keV) Energy Band arcsec stat.error;phys.angSize.smajAxis;stat.max;em.X-ray.soft double nullable w_counts_ap_hi Upper Limit of Net Counts in HRC Wide (~0.1-10.0 keV) Energy Band ct stat.error;phot.count;stat.max;em.X-ray double nullable h_count_rate_ap Net Count Rate from Source Region Aperture in ACIS Hard (2.0-7.0 keV) Band ct/s phot.count;em.X-ray.medium double nullable u_counts_ap Aperture-Corrected Detection Net Counts in ACIS Ultrasoft (0.2-0.5 keV) Band ct phot.count;em.X-ray.soft double nullable h_photflux_ap_lo Lower Limit of Net Photon Flux from Source Region Aperture in ACIS Hard Band photon/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.medium double nullable m_flux_ap90 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 h_major_axis_hi Upper Limit of Major Axis of Extent in ACIS Hard (2.0-7.0 keV) Energy Band arcsec stat.error;phys.angSize.smajAxis;stat.max;em.X-ray.medium double nullable h_minor_axis_hi Upper Limit of Minor Axis of Extent in ACIS Hard Band arcsec stat.error;phys.angSize.sminAxis;stat.max;em.X-ray.medium double nullable m_flux_ap_hi Upper Limit of Net Energy Flux from Source Region Aperture in ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.medium double nullable u_counts_ap_lo Lower Limit of Net Counts in ACIS Ultrasoft (0.2-0.5 keV) Energy Band ct stat.error;phot.count;stat.min;em.X-ray.soft double nullable hardness_ratio_ms ACIS Medium-Soft Photon Flux Hardness Ratio phot.color;em.X-ray double nullable h_count_rate_ap90 Net Count Rate from PSF 90% ECF Aperture in ACIS Hard (2.0-7.0 keV) Energy Band ct/s phot.count;em.X-ray.medium double nullable m_detect_significance Significance of Detection in the ACIS Medium (1.2-2.0 keV) Energy Band stat.likelihood;phot.count;em.X-ray.medium double nullable ra_stack Right Ascension of Detect Stack Tangent Plane Reference Position degree pos.eq.ra double nullable x_offset Sky Coordinate System X Translation Correction to Co-Align with Gaia-CRF3 arcsec pos.eq.ra;pos.errorEllipse double nullable w_flux_ap Net Energy Flux from Source Region Aperture in HRC Wide Band erg/s/cm^2 phot.flux;src.net;em.X-ray double nullable w_major_axis_hi Upper Limit of Major Axis of Extent in HRC Wide Band arcsec stat.error;phys.angSize.smajAxis;stat.max;em.X-ray double nullable b_likelihood Log of Likelihood of Detection in ACIS Broad (0.5-7.0 keV) Energy Band stat.likelihood;phot.count;em.X-ray double nullable h_minor_axis_lo Lower Limit of Minor Axis of Extent in ACIS Hard Band arcsec stat.error;phys.angSize.sminAxis;stat.min;em.X-ray.medium double nullable hardness_ratio_ms_hi Upper Limit of ACIS Medium-Soft Photon Flux Hardness Ratio stat.error;phot.color;stat.max;em.X-ray double nullable w_counts_ap_lo Lower Limit of Net Counts in HRC Wide (~0.1-10.0 keV) Energy Band ct stat.error;phot.count;stat.min;em.X-ray double nullable m_counts_ap90_hi Upper Limit of Net Counts from PSF 90% ECF Aperture for ACIS Medium Band ct stat.error;phot.count;stat.max;em.X-ray.medium double nullable h_var_inter_index Inter-Stacked Observation Variability Index for ACIS Hard (2.0-7.0 keV) Band src.var.index;em.X-ray.medium short nullable h_var_intra_prob Gregory-Loredo Variability Probability in ACIS Hard (2.0-7.0 keV) Energy Band stat.probability;src.var;em.X-ray.medium double nullable w_position_angle_hi Upper Limit of Position Angle of Major Axis of Extent in HRC Wide Band degree stat.error;pos.posAng;stat.max;em.X-ray double nullable s_kp_intra_prob Kuiper Test Variability Probability in ACIS Soft (0.5-1.2 keV) Energy Band stat.probability;src.var;em.X-ray.soft double nullable m_counts_ap Aperture-Corrected Detection Net Counts in ACIS Medium (1.2-2.0 keV) Band ct phot.count;em.X-ray.medium double nullable man_astrom_flag Flag [TF] Indicates Stack Astrometric Transform Manually Modified by Human meta.code char nullable h_detect_significance Significance of Detection in the ACIS Hard (2.0-7.0 keV) Energy Band stat.likelihood;phot.count;em.X-ray.medium double nullable h_counts_ap90_lo Lower Limit of Net Counts from PSF 90% ECF Aperture for ACIS Hard Energy Band ct stat.error;phot.count;stat.min;em.X-ray.medium double nullable u_count_rate_ap Net Count Rate from Source Region Aperture in ACIS Ultrasoft (0.2-0.5 keV) Band ct/s phot.count;em.X-ray.soft double nullable var_inter_hard_flag Flag [FT] Indicates Detection Hardness Ratios Statistically Inconsistent meta.code;src.var char nullable h_src_area Area of the Deconvolved Detection Extent Ellipse or Polygon in ACIS Hard Band arcsec^2 phys.angArea;em.X-ray.medium double nullable b_minor_axis 1-Sigma Radius Along Minor Axis of Extent in ACIS Broad Band arcsec phys.angSize.sminAxis;em.X-ray double nullable h_count_rate_ap90_hi Upper Limit of Net Count Rate from PSF 90% ECF Aperture in ACIS Hard Band ct/s stat.error;phot.count;stat.max;em.X-ray.medium double nullable h_position_angle_hi Upper Limit of Position Angle of Major Axis of Extent in ACIS Hard Band degree stat.error;pos.posAng;stat.max;em.X-ray.medium double nullable ascdsver Software Version Used to Create the Level 3 Detect Stack Event Data File meta.version;meta.software char nullable w_flux_ap90_lo Lower Limit of Net Energy Flux from PSF 90% ECF Aperture in HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray double nullable u_var_inter_index Inter-Stacked Observation Variability Index for ACIS Ultrasoft (0.2-0.5 keV) src.var.index;em.X-ray.soft short nullable m_var_intra_index Gregory-Loredo Variability Index for ACIS Medium (1.2-2.0 keV) Energy Band src.var.index;em.X-ray.medium short nullable u_major_axis_lo Lower Limit of Major Axis of Extent in ACIS Ultrasoft Band arcsec stat.error;phys.angSize.smajAxis;stat.min;em.X-ray.soft double nullable h_flux_ap_hi Upper Limit of Net Energy Flux from Source Region Aperture in ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.medium double nullable u_var_inter_sigma Inter-Stacked Flux Variability Standard Dev. for ACIS Ultrasoft (0.2-0.5 keV) photon/s/cm^2 stat.stdev;arith;phot.flux;em.X-ray.soft double nullable s_flux_ap90_hi Upper Limit of Net Energy Flux from PSF 90% ECF Aperture in ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.soft double nullable w_counts_ap90_lo Lower Limit of Net Counts from PSF 90% ECF Aperture for HRC Wide Energy Band ct stat.error;phot.count;stat.min;em.X-ray double nullable s_likelihood Log of Likelihood of Detection in ACIS Soft (0.5-1.2 keV) Energy Band stat.likelihood;phot.count;em.X-ray.soft double nullable sat_src_flag Flag [FT] Indicates Detection Saturated in All Stacked Observations meta.code.qual;instr.saturation char nullable b_photflux_ap Net Photon Flux from Source Region Aperture in ACIS Broad Band photon/s/cm^2 phot.flux;src.net;em.X-ray double nullable dec_ap Declination of Center of the Source Region and Background Region Apertures degree pos.eq.dec double nullable w_ks_intra_prob Kolmogorov-Smirnov Test Variability Probability in HRC Wide (~0.1-10.0 keV) stat.probability;src.var;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 theta_mean Mean Source Region Aperture Off-Axis Angle from All Stacked Observations arcmin pos.posAng;stat.mean double nullable u_likelihood Log of Likelihood of Detection in ACIS Ultrasoft (0.2-0.5 keV) Energy Band stat.likelihood;phot.count;em.X-ray.soft double nullable s_photflux_ap_lo Lower Limit of Net Photon Flux from Source Region Aperture in ACIS Soft Band photon/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.soft double nullable b_photflux_ap_lo Lower Limit of Net Photon Flux from Source Region Aperture in ACIS Broad Band photon/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray double nullable u_position_angle_lo Lower Limit of Position Angle of Major Axis of Extent in ACIS Ultrasoft Band degree stat.error;pos.posAng;stat.min;em.X-ray.soft double nullable u_ks_intra_prob Kolmogorov-Smirnov Test Variability Probability in ACIS Ultrasoft (0.2-0.5 keV) stat.probability;src.var;em.X-ray.soft double nullable w_var_intra_index Gregory-Loredo Variability Index for HRC Wide (~0.1-10.0 keV) Energy Band src.var.index;em.X-ray short nullable s_counts_ap90_hi Upper Limit of Net Counts from PSF 90% ECF Aperture for ACIS Soft Energy Band ct stat.error;phot.count;stat.max;em.X-ray.soft double nullable h_photflux_ap Net Photon Flux from Source Region Aperture in ACIS Hard Band photon/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable man_add_flag Flag [FT] Indicates Detection Manually Added in the Catalog Via Human Review meta.code.qual char nullable w_flux_ap_lo Lower Limit of Net Energy Flux from Source Region Aperture in HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray double nullable multi_chip_code Source Position Dithered Multiple Detector Chips (Bit Encoded) meta.code short nullable h_counts_ap_lo Lower Limit of Net Counts in ACIS Hard (2.0-7.0 keV) Energy Band ct stat.error;phot.count;stat.min;em.X-ray.medium double nullable s_flux_ap Net Energy Flux from Source Region Aperture in ACIS Soft Band erg/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable w_var_intra_prob Gregory-Loredo Variability Probability in HRC Wide (~0.1-10.0 keV) Energy Band stat.probability;src.var;em.X-ray double nullable m_minor_axis_lo Lower Limit of Minor Axis of Extent in ACIS Medium (1.2-2.0 keV) Energy Band arcsec stat.error;phys.angSize.sminAxis;stat.min;em.X-ray.medium double nullable m_photflux_ap_lo Lower Limit of Net Photon Flux from Source Region Aperture in ACIS Medium Band photon/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.medium double nullable w_var_inter_sigma Inter-Stacked Flux Variability Standard Deviation for HRC Wide (~0.1-10.0 keV) photon/s/cm^2 stat.stdev;arith;phot.flux;em.X-ray double nullable m_ks_intra_prob Kolmogorov-Smirnov Test Variability Probability in ACIS Medium (1.2-2.0 keV) stat.probability;src.var;em.X-ray.medium double nullable b_count_rate_ap90_lo Lower Limit of Net Count Rate from PSF 90% ECF Aperture in ACIS Broad Band ct/s stat.error;phot.count;stat.min;em.X-ray double nullable rot_offset Sky Coordinate System Roll Angle Correction to Co-Align with Gaia-CRF3 degree pos.posAng;pos.errorEllipse double nullable w_major_axis 1-Sigma Radius Along Major Axis of Extent in HRC Wide Band arcsec phys.angSize.smajAxis;em.X-ray double nullable s_minor_axis_lo Lower Limit of Minor Axis of Extent in ACIS Soft (0.5-1.2 keV) Energy Band arcsec stat.error;phys.angSize.sminAxis;stat.min;em.X-ray.soft double nullable conf_code Code Indicates Compact Detection May Be Confused (Bit Encoded) meta.code short nullable u_position_angle Position Angle of Major Axis of Extent in ACIS Ultrasoft Band degree pos.posAng;em.X-ray.soft double nullable u_flux_ap90_lo Lower Limit of Net Energy Flux from PSF 90% ECF Aperture in ACIS Ultrasoft Band erg/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.soft double nullable w_count_rate_ap Net Count Rate from Source Region Aperture in HRC Wide (~0.1-10.0 keV) Band ct/s phot.count;em.X-ray double nullable m_count_rate_ap90_hi Upper Limit of Net Count Rate from PSF 90% ECF Aperture in ACIS Medium Band ct/s stat.error;phot.count;stat.max;em.X-ray.medium double nullable h_major_axis_lo Lower Limit of Major Axis of Extent in ACIS Hard (2.0-7.0 keV) Energy Band arcsec stat.error;phys.angSize.smajAxis;stat.min;em.X-ray.medium double nullable b_var_intra_index Gregory-Loredo Variability Index for ACIS Broad (0.5-7.0 keV) Energy Band src.var.index;em.X-ray short nullable w_count_rate_ap90_lo Lower Limit of Net Count Rate from PSF 90% ECF Aperture in HRC Wide Band ct/s stat.error;phot.count;stat.min;em.X-ray double nullable u_minor_axis_hi Upper Limit of Minor Axis of Extent in ACIS Ultrasoft Band arcsec stat.error;phys.angSize.sminAxis;stat.max;em.X-ray.soft double nullable h_var_inter_prob Inter-Stacked Observation Variability Probability in ACIS Hard (2.0-7.0 keV) stat.stdev;arith;phot.flux;em.X-ray.medium double nullable m_likelihood Log of Likelihood of Detection in ACIS Medium (1.2-2.0 keV) Energy Band stat.likelihood;phot.count;em.X-ray.medium double nullable b_photflux_ap_hi Upper Limit of Net Photon Flux from Source Region Aperture in ACIS Broad Band photon/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray double nullable u_kp_intra_prob Kuiper Test Variability Probability in ACIS Ultrasoft (0.2-0.5 keV) Energy Band stat.probability;src.var;em.X-ray.soft double nullable s_minor_axis 1-Sigma Radius Along Minor Axis of Extent in ACIS Soft Band arcsec phys.angSize.sminAxis;em.X-ray.soft double nullable dither_warning_flag Flag [FT] Indicates Dither Frequency Warning meta.code char nullable u_detect_significance Significance of Detection in the ACIS Ultrasoft (0.2-0.5 keV) Energy Band stat.likelihood;phot.count;em.X-ray.soft double nullable hardness_ratio_hs_lo Lower Limit of ACIS Hard-Soft Photon Flux Hardness Ratio stat.error;phot.color;stat.min;em.X-ray double nullable hardness_ratio_ms_lo Lower Limit of ACIS Medium-Soft Photon Flux Hardness Ratio stat.error;phot.color;stat.min;em.X-ray double nullable bii Galactic Latitude of Detection Position degree pos.galactic.lat double nullable h_flux_significance Significance of Detection from Photon Flux in ACIS Hard (2.0-7.0 keV) Band stat.confidenceLevel;phot.flux;em.X-ray.medium double nullable u_count_rate_ap_lo Lower Limit of Net Count Rate from Source Region Aperture in ACIS Ultrasoft Band ct/s stat.error;phot.count;stat.min;em.X-ray.soft double nullable s_flux_ap90 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 instrument Instrument Used for the Stacked Observations (ACIS or HRC) instr;instr.det char nullable var_flag Flag [FT] Indicates Detection Displays Flux Variability meta.code;src.var char nullable dec_stack Declination of Detect Stack Tangent Plane Reference Position degree pos.eq.dec double nullable b_flux_ap90_lo Lower Limit of Net Energy Flux from PSF 90% ECF Aperture in ACIS Broad Band erg/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray double nullable b_photflux_ap90_lo Lower Limit of Net Photon Flux from PSF 90% ECF Aperture in ACIS Broad Band photon/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray double nullable u_minor_axis 1-Sigma Radius Along Minor Axis of Extent in ACIS Ultrasoft Band arcsec phys.angSize.sminAxis;em.X-ray.soft double nullable s_position_angle_lo Lower Limit of Position Angle of Major Axis of Extent in ACIS Soft Band degree stat.error;pos.posAng;stat.min;em.X-ray.soft double nullable h_count_rate_ap_lo Lower Limit of Net Count Rate from Source Region Aperture in ACIS Hard Band ct/s stat.error;phot.count;stat.min;em.X-ray.medium double nullable major_axis1_apbkg Semi-Major Axis of the Inner Ellipse of the Annular Background Region Aperture arcsec phys.angSize.smajAxis;instr.background double nullable h_var_inter_sigma Inter-Stacked Flux Variability Standard Deviation for ACIS Hard (2.0-7.0 keV) photon/s/cm^2 stat.stdev;arith;phot.flux;em.X-ray.medium double nullable h_photflux_ap90 Net Photon Flux from PSF 90% ECF Aperture in ACIS Hard Band photon/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable var_inter_hard_hm_prob Inter-Obs. ACIS Hard-Medium Photon Flux Hardness Ratio Variability Probability stat.probability;src.var double nullable b_counts_ap_lo Lower Limit of Net Counts in ACIS Broad (0.5-7.0 keV) Energy Band ct stat.error;phot.count;stat.min;em.X-ray double nullable b_photflux_ap90_hi Upper Limit of Net Photon Flux from PSF 90% ECF Aperture in ACIS Broad Band photon/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray double nullable b_count_rate_ap_lo Lower Limit of Net Count Rate from Source Region Aperture in ACIS Broad Band ct/s stat.error;phot.count;stat.min;em.X-ray double nullable m_kp_intra_prob Kuiper Test Variability Probability in ACIS Medium (1.2-2.0 keV) Energy Band stat.probability;src.var;em.X-ray.medium double nullable s_count_rate_ap90_hi Upper Limit of Net Count Rate from PSF 90% ECF Aperture in ACIS Soft Band ct/s stat.error;phot.count;stat.max;em.X-ray.soft double nullable w_kp_intra_prob Kuiper Test Variability Probability in HRC Wide (~0.1-10.0 keV) Energy Band stat.probability;src.var;em.X-ray double nullable m_minor_axis_hi Upper Limit of Minor Axis of Extent in ACIS Medium (1.2-2.0 keV) Energy Band arcsec stat.error;phys.angSize.sminAxis;stat.max;em.X-ray.medium double nullable w_flux_ap90_hi Upper Limit of Net Energy Flux from PSF 90% ECF Aperture in HRC Wide Band erg/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray double nullable m_counts_ap90 Net Counts from PSF 90% ECF Aperture for ACIS Medium (1.2-2.0 keV) Energy Band ct phot.count;em.X-ray.medium double nullable b_photflux_ap90 Net Photon Flux from PSF 90% ECF Aperture in ACIS Broad Band photon/s/cm^2 phot.flux;src.net;em.X-ray double nullable w_photflux_ap90_lo Lower Limit of Net Photon Flux from PSF 90% ECF Aperture in HRC Wide Band photon/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray double nullable b_ks_intra_prob Kolmogorov-Smirnov Test Variability Probability in ACIS Broad (0.5-7.0 keV) stat.probability;src.var;em.X-ray double nullable man_reg_flag Flag [FT] Indicates Source Region Parameters Manually Modified Via Human Review meta.code.qual char nullable h_flux_ap90_lo Lower Limit of Net Energy Flux from PSF 90% ECF Aperture in ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.medium double nullable h_flux_ap90 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 b_minor_axis_hi Upper Limit of Minor Axis of Extent in ACIS Broad (0.5-7.0 keV) Energy Band arcsec stat.error;phys.angSize.sminAxis;stat.max;em.X-ray double nullable w_major_axis_lo Lower Limit of Major Axis of Extent in HRC Wide Band arcsec stat.error;phys.angSize.smajAxis;stat.min;em.X-ray double nullable m_count_rate_ap_hi Upper Limit of Net Count Rate from Source Region Aperture in ACIS Medium Band ct/s stat.error;phot.count;stat.max;em.X-ray.medium double nullable m_photflux_ap90_hi Upper Limit of Net Photon Flux from PSF 90% ECF Aperture in ACIS Medium Band photon/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.medium double nullable m_var_inter_prob Inter-Stacked Observation Variability Probability in ACIS Medium (1.2-2.0 keV) stat.stdev;arith;phot.flux;em.X-ray.medium double nullable ra_ap Right Ascension of Center of the Source Region and Background Region Apertures degree pos.eq.ra double nullable u_count_rate_ap90_hi Upper Limit of Net Count Rate from PSF 90% ECF Aperture in ACIS Ultrasoft Band ct/s stat.error;phot.count;stat.max;em.X-ray.soft double nullable m_var_inter_index Inter-Stacked Observation Variability Index for ACIS Medium (1.2-2.0 keV) Band src.var.index;em.X-ray.medium short nullable h_flux_ap90_hi Upper Limit of Net Energy Flux from PSF 90% ECF Aperture in ACIS Hard Band erg/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.medium double nullable minor_axis2_apbkg Semi-Minor Axis of the Outer Ellipse of the Annular Background Region Aperture arcsec phys.angSize.sminAxis;instr.background double nullable s_position_angle Position Angle of Major Axis of Extent in ACIS Soft (0.5-1.2 keV) Energy Band degree pos.posAng;em.X-ray.soft double nullable hardness_ratio_hs ACIS Hard-Soft Photon Flux Hardness Ratio phot.color;em.X-ray double nullable b_minor_axis_lo Lower Limit of Minor Axis of Extent in ACIS Broad (0.5-7.0 keV) Energy Band arcsec stat.error;phys.angSize.sminAxis;stat.min;em.X-ray double nullable h_var_intra_index Gregory-Loredo Variability Index for ACIS Hard (2.0-7.0 keV) Energy Band src.var.index;em.X-ray.medium short nullable h_likelihood Log of Likelihood of Detection in ACIS Hard (2.0-7.0 keV) Energy Band stat.likelihood;phot.count;em.X-ray.medium double nullable m_var_intra_prob Gregory-Loredo Variability Probability in ACIS Medium (1.2-2.0 keV) Energy Band stat.probability;src.var;em.X-ray.medium double nullable h_ks_intra_prob Kolmogorov-Smirnov Test Variability Probability in ACIS Hard (2.0-7.0 keV) stat.probability;src.var;em.X-ray.medium double nullable man_pos_flag Flag [FT] Indicates Best Fit Detection Position Manually Modified Via Human meta.code.qual char nullable w_minor_axis 1-Sigma Radius Along Minor Axis of Extent in HRC Wide Band arcsec phys.angSize.sminAxis;em.X-ray double nullable b_position_angle_hi Upper Limit of Position Angle of Major Axis of Extent in ACIS Broad Band degree stat.error;pos.posAng;stat.max;em.X-ray double nullable s_major_axis_lo Lower Limit of Major Axis of Extent in ACIS Soft (0.5-1.2 keV) Energy Band arcsec stat.error;phys.angSize.smajAxis;stat.min;em.X-ray.soft double nullable w_counts_ap90 Net Counts from PSF 90% ECF Aperture for HRC Wide (~0.1-10.0 keV) Energy Band ct phot.count;em.X-ray double nullable u_count_rate_ap90 Net Count Rate from PSF 90% ECF Aperture in ACIS Ultrasoft (0.2-0.5 keV) Band ct/s phot.count;em.X-ray.soft double nullable w_flux_significance Significance of Detection from Photon Flux in HRC Wide (~0.1-10.0 keV) Band stat.confidenceLevel;phot.flux;em.X-ray double nullable s_position_angle_hi Upper Limit of Position Angle of Major Axis of Extent in ACIS Soft Band degree stat.error;pos.posAng;stat.max;em.X-ray.soft double nullable s_count_rate_ap_lo Lower Limit of Net Count Rate from Source Region Aperture in ACIS Soft Band ct/s stat.error;phot.count;stat.min;em.X-ray.soft double nullable hardness_ratio_hm ACIS Hard-Medium Photon Flux Hardness Ratio phot.color;em.X-ray double nullable u_photflux_ap Net Photon Flux from Source Region Aperture in ACIS Ultrasoft Band photon/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable h_minor_axis 1-Sigma Radius Along Minor Axis of Extent in ACIS Hard Band arcsec phys.angSize.sminAxis;em.X-ray.medium double nullable u_var_inter_prob Inter-Stacked Observation Variability Probab. in ACIS Ultrasoft (0.2-0.5 keV) stat.stdev;arith;phot.flux;em.X-ray.soft double nullable s_counts_ap Aperture-Corrected Detection Net Counts in ACIS Soft (0.5-1.2 keV) Band ct phot.count;em.X-ray.soft double nullable u_src_area Area of the Deconvolved Detection Extent Ellipse or Polygon in ACIS Ultrasoft arcsec^2 phys.angArea;em.X-ray.soft double nullable s_counts_ap90_lo Lower Limit of Net Counts from PSF 90% ECF Aperture for ACIS Soft Energy Band ct stat.error;phot.count;stat.min;em.X-ray.soft double nullable s_counts_ap90 Net Counts from PSF 90% ECF Aperture for ACIS Soft (0.5-1.2 keV) Energy Band ct phot.count;em.X-ray.soft double nullable u_var_intra_index Gregory-Loredo Variability Index for ACIS Ultrasoft (0.2-0.5 keV) Energy Band src.var.index;em.X-ray.soft short nullable s_flux_significance Significance of Detection from Photon Flux in ACIS Soft (0.5-1.2 keV) Band stat.confidenceLevel;phot.flux;em.X-ray.soft double nullable u_photflux_ap90_hi Upper Limit of Net Photon Flux from PSF 90% ECF Aperture in ACIS Ultrasoft Band photon/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.soft double nullable m_photflux_ap90_lo Lower Limit of Net Photon Flux from PSF 90% ECF Aperture in ACIS Medium Band photon/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.medium double nullable m_var_inter_sigma Inter-Stacked Flux Variability Standard Deviation for ACIS Medium (1.2-2.0 keV) photon/s/cm^2 stat.stdev;arith;phot.flux;em.X-ray.medium double nullable s_photflux_ap90 Net Photon Flux from PSF 90% ECF Aperture in ACIS Soft Band photon/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable s_count_rate_ap_hi Upper Limit of Net Count Rate from Source Region Aperture in ACIS Soft Band ct/s stat.error;phot.count;stat.max;em.X-ray.soft double nullable w_counts_ap Aperture-Corrected Detection Net Counts in HRC Wide (~0.1-10.0 keV) Band ct phot.count;em.X-ray double nullable m_flux_ap Net Energy Flux from Source Region Aperture in ACIS Medium Band erg/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable u_counts_ap90_lo Lower Limit of Net Counts from PSF 90% ECF Aperture for ACIS Ultrasoft Band ct stat.error;phot.count;stat.min;em.X-ray.soft double nullable h_count_rate_ap90_lo Lower Limit of Net Count Rate from PSF 90% ECF Aperture in ACIS Hard Band ct/s stat.error;phot.count;stat.min;em.X-ray.medium double nullable m_src_area Area of the Deconvolved Detection Extent Ellipse or Polygon in ACIS Medium Band arcsec^2 phys.angArea;em.X-ray.medium double nullable h_kp_intra_prob Kuiper Test Variability Probability in ACIS Hard (2.0-7.0 keV) Energy Band stat.probability;src.var;em.X-ray.medium double nullable s_var_inter_index Inter-Stacked Observation Variability Index for ACIS Soft (0.5-1.2 keV) Band src.var.index;em.X-ray.soft short nullable s_major_axis 1-Sigma Radius Along Major Axis of Extent in ACIS Soft Band arcsec phys.angSize.smajAxis;em.X-ray.soft double nullable u_major_axis 1-Sigma Radius Along Major Axis of Extent in ACIS Ultrasoft Band arcsec phys.angSize.smajAxis;em.X-ray.soft double nullable m_count_rate_ap_lo Lower Limit of Net Count Rate from Source Region Aperture in ACIS Medium Band ct/s stat.error;phot.count;stat.min;em.X-ray.medium double nullable u_photflux_ap_lo Lower Limit of Net Photon Flux from Source Region Aperture in ACIS Ultrasoft photon/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.soft double nullable s_photflux_ap Net Photon Flux from Source Region Aperture in ACIS Soft Band photon/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable h_counts_ap Aperture-Corrected Detection Net Counts in ACIS Hard (2.0-7.0 keV) Band ct phot.count;em.X-ray.medium double nullable s_src_area Area of the Deconvolved Detection Extent Ellipse or Polygon in ACIS Soft Band arcsec^2 phys.angArea;em.X-ray.soft double nullable h_flux_ap Net Energy Flux from Source Region Aperture in ACIS Hard Band erg/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable edge_code Code Indication Detection Position Near a Detector Boundary (Bit Encoded) meta.code short nullable b_count_rate_ap90_hi Upper Limit of Net Count Rate from PSF 90% ECF Aperture in ACIS Broad Band ct/s stat.error;phot.count;stat.max;em.X-ray double nullable m_position_angle_lo Lower Limit of Position Angle of Major Axis of Extent in ACIS Medium Band degree stat.error;pos.posAng;stat.min;em.X-ray.medium double nullable u_flux_ap_lo Lower Limit of Net Energy Flux from Source Region Aperture in ACIS Ultrasoft erg/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.soft double nullable u_var_intra_prob Gregory-Loredo Variability Probability in ACIS Ultrasoft (0.2-0.5 keV) Band stat.probability;src.var;em.X-ray.soft double nullable w_var_inter_prob Inter-Stacked Observation Variability Probability in HRC Wide (~0.1-10.0 keV) stat.stdev;arith;phot.flux;em.X-ray double nullable grating Transmission Grating Used for the Stacked Observations (NONE, HETG, or LETG) instr;instr.setup char nullable s_flux_ap_hi Upper Limit of Net Energy Flux from Source Region Aperture in ACIS Soft Band erg/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.soft double nullable pileup_flag Flag [FT] Indicates ACIS Pile-Up Fraction Exceeds ~10% in Any Stacked Obs. meta.code char nullable h_count_rate_ap_hi Upper Limit of Net Count Rate from Source Region Aperture in ACIS Hard Band ct/s stat.error;phot.count;stat.max;em.X-ray.medium double nullable w_photflux_ap_hi Upper Limit of Net Photon Flux from Source Region Aperture in HRC Wide Band photon/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray double nullable position_angle_ap Position Angle of the Semi-Major Axis of the Elliptical Source Region Aperture degree pos.posAng double nullable hardness_ratio_hs_hi Upper Limit of ACIS Hard-Soft Photon Flux Hardness Ratio stat.error;phot.color;stat.max;em.X-ray double nullable s_photflux_ap_hi Upper Limit of Net Photon Flux from Source Region Aperture in ACIS Soft Band photon/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.soft double nullable m_count_rate_ap Net Count Rate from Source Region Aperture in ACIS Medium (1.2-2.0 keV) Band ct/s phot.count;em.X-ray.medium double nullable w_photflux_ap90_hi Upper Limit of Net Photon Flux from PSF 90% ECF Aperture in HRC Wide Band photon/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray double nullable s_var_intra_prob Gregory-Loredo Variability Probability in ACIS Soft (0.5-1.2 keV) Energy Band stat.probability;src.var;em.X-ray.soft double nullable var_inter_hard_ms_prob Inter-Obs. ACIS Medium-Soft Photon Flux Hardness Ratio Variability Probability stat.probability;src.var double nullable w_position_angle Position Angle of Major Axis of Extent in HRC Wide Band degree pos.posAng;em.X-ray double nullable b_counts_ap90_lo Lower Limit of Net Counts from PSF 90% ECF Aperture for ACIS Broad Energy Band ct stat.error;phot.count;stat.min;em.X-ray double nullable s_photflux_ap90_hi Upper Limit of Net Photon Flux from PSF 90% ECF Aperture in ACIS Soft Band photon/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.soft double nullable w_likelihood Log of Likelihood of Detection in HRC Wide (~0.1-10.0 keV) Energy Band stat.likelihood;phot.count;em.X-ray double nullable u_counts_ap90_hi Upper Limit of Net Counts from PSF 90% ECF Aperture for ACIS Ultrasoft Band ct stat.error;phot.count;stat.max;em.X-ray.soft double nullable b_count_rate_ap_hi Upper Limit of Net Count Rate from Source Region Aperture in ACIS Broad Band ct/s stat.error;phot.count;stat.max;em.X-ray double nullable b_position_angle Position Angle of Major Axis of Extent in ACIS Broad (0.5-7.0 keV) Energy Band degree pos.posAng;em.X-ray double nullable m_counts_ap_lo Lower Limit of Net Counts in ACIS Medium (1.2-2.0 keV) Energy Band ct stat.error;phot.count;stat.min;em.X-ray.medium double nullable b_var_inter_prob Inter-Stacked Observation Variability Probability in ACIS Broad (0.5-7.0 keV) stat.stdev;arith;phot.flux;em.X-ray double nullable m_counts_ap_hi Upper Limit of Net Counts in ACIS Medium (1.2-2.0 keV) Energy Band ct stat.error;phot.count;stat.max;em.X-ray.medium double nullable m_count_rate_ap90 Net Count Rate from PSF 90% ECF Aperture in ACIS Medium Band ct/s phot.count;em.X-ray.medium double nullable s_var_inter_prob Inter-Stacked Observation Variability Probability in ACIS Soft (0.5-1.2 keV) stat.stdev;arith;phot.flux;em.X-ray.soft double nullable b_flux_ap90 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 var_inter_hard_hs_sigma Inter-Obs. ACIS Hard-Soft Photon Flux Hardness Ratio Variability Std. Deviation stat.stdev;arith;phot.flux double nullable w_photflux_ap_lo Lower Limit of Net Photon Flux from Source Region Aperture in HRC Wide Band photon/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray double nullable b_kp_intra_prob Kuiper Test Variability Probability in ACIS Broad (0.5-7.0 keV) Energy Band stat.probability;src.var;em.X-ray double nullable m_major_axis_hi Upper Limit of Major Axis of Extent in ACIS Medium (1.2-2.0 keV) Energy Band arcsec stat.error;phys.angSize.smajAxis;stat.max;em.X-ray.medium double nullable u_count_rate_ap_hi Upper Limit of Net Count Rate from Source Region Aperture in ACIS Ultrasoft Band ct/s stat.error;phot.count;stat.max;em.X-ray.soft double nullable w_flux_ap90 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 s_counts_ap_hi Upper Limit of Net Counts in ACIS Soft (0.5-1.2 keV) Energy Band ct stat.error;phot.count;stat.max;em.X-ray.soft double nullable man_inc_flag Flag [FT] Indicates Detection Manually Included in the Catalog Via Human Review meta.code.qual char nullable w_count_rate_ap90_hi Upper Limit of Net Count Rate from PSF 90% ECF Aperture in HRC Wide Band ct/s stat.error;phot.count;stat.max;em.X-ray double nullable m_count_rate_ap90_lo Lower Limit of Net Count Rate from PSF 90% ECF Aperture in ACIS Medium Band ct/s stat.error;phot.count;stat.min;em.X-ray.medium double nullable w_count_rate_ap90 Net Count Rate from PSF 90% ECF Aperture in HRC Wide Band ct/s phot.count;em.X-ray double nullable m_counts_ap90_lo Lower Limit of Net Counts from PSF 90% ECF Aperture for ACIS Medium Band ct stat.error;phot.count;stat.min;em.X-ray.medium double nullable w_minor_axis_lo Lower Limit of Minor Axis of Extent in HRC Wide Band arcsec stat.error;phys.angSize.sminAxis;stat.min;em.X-ray double nullable w_count_rate_ap_lo Lower Limit of Net Count Rate from Source Region Aperture in HRC Wide Band ct/s stat.error;phot.count;stat.min;em.X-ray double nullable m_flux_ap_lo Lower Limit of Net Energy Flux from Source Region Aperture in ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.medium double nullable likelihood_class Highest Detection Likelihood Classification Across All Energy Bands stat.likelihood char nullable streak_src_flag Flag [FT] Indicates Detection Located on ACIS Readout Streak meta.code.qual char nullable s_counts_ap_lo Lower Limit of Net Counts in ACIS Soft (0.5-1.2 keV) Energy Band ct stat.error;phot.count;stat.min;em.X-ray.soft double nullable s_var_intra_index Gregory-Loredo Variability Index for ACIS Soft (0.5-1.2 keV) Energy Band src.var.index;em.X-ray.soft short nullable m_photflux_ap Net Photon Flux from Source Region Aperture in ACIS Medium Band photon/s/cm^2 phot.flux;src.net;em.X-ray.medium double nullable u_major_axis_hi Upper Limit of Major Axis of Extent in ACIS Ultrasoft Band arcsec stat.error;phys.angSize.smajAxis;stat.max;em.X-ray.soft double nullable h_position_angle Position Angle of Major Axis of Extent in ACIS Hard (2.0-7.0 keV) Energy Band degree pos.posAng;em.X-ray.medium double nullable var_inter_hard_hm_sigma Inter-Obs. ACIS Hard-Medium Photon Flux Hardness Ratio Variability Std. Dev. stat.stdev;arith;phot.flux double nullable s_count_rate_ap90_lo Lower Limit of Net Count Rate from PSF 90% ECF Aperture in ACIS Soft Band ct/s stat.error;phot.count;stat.min;em.X-ray.soft double nullable m_major_axis_lo Lower Limit of Major Axis of Extent in ACIS Medium (1.2-2.0 keV) Energy Band arcsec stat.error;phys.angSize.smajAxis;stat.min;em.X-ray.medium double nullable b_major_axis 1-Sigma Radius Along Major Axis of Extent in ACIS Broad Band arcsec phys.angSize.smajAxis;em.X-ray double nullable b_counts_ap Aperture-Corrected Detection Net Counts in ACIS Broad (0.5-7.0 keV) Band ct phot.count;em.X-ray double nullable b_var_inter_sigma Inter-Stacked Flux Variability Standard Deviation for ACIS Broad (0.5-7.0 keV) photon/s/cm^2 stat.stdev;arith;phot.flux;em.X-ray double nullable m_major_axis 1-Sigma Radius Along Major Axis of Extent in ACIS Medium Band arcsec phys.angSize.smajAxis;em.X-ray.medium double nullable hardness_ratio_hm_lo ACIS Hard-Medium Photon Flux Hardness Ratio (68% lower confidence limit) stat.error;phot.color;stat.min;em.X-ray double nullable major_axis_ap Semi-Major Axis of the Elliptical Source Region Aperture arcsec phys.angSize.smajAxis double nullable u_photflux_ap_hi Upper Limit of Net Photon Flux from Source Region Aperture in ACIS Ultrasoft photon/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.soft double nullable h_counts_ap90_hi Upper Limit of Net Counts from PSF 90% ECF Aperture for ACIS Hard Energy Band ct stat.error;phot.count;stat.max;em.X-ray.medium double nullable b_major_axis_lo Lower Limit of Major Axis of Extent in ACIS Broad (0.5-7.0 keV) Energy Band arcsec stat.error;phys.angSize.smajAxis;stat.min;em.X-ray double nullable b_var_intra_prob Gregory-Loredo Variability Probability in ACIS Broad (0.5-7.0 keV) Energy Band stat.probability;src.var;em.X-ray double nullable u_photflux_ap90 Net Photon Flux from PSF 90% ECF Aperture in ACIS Ultrasoft Band photon/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable hardness_ratio_hm_hi ACIS Hard-Medium Photon Flux Hardness Ratio (68% upper confidence limit) stat.error;phot.color;stat.max;em.X-ray double nullable u_flux_ap Net Energy Flux from Source Region Aperture in ACIS Ultrasoft Band erg/s/cm^2 phot.flux;src.net;em.X-ray.soft double nullable s_var_inter_sigma Inter-Stacked Flux Variability Standard Deviation for ACIS Soft (0.5-1.2 keV) photon/s/cm^2 stat.stdev;arith;phot.flux;em.X-ray.soft double nullable m_position_angle Position Angle of Major Axis of Extent in ACIS Medium (1.2-2.0 keV) Energy Band degree pos.posAng;em.X-ray.medium double nullable b_var_inter_index Inter-Stacked Observation Variability Index for ACIS Broad (0.5-7.0 keV) Band src.var.index;em.X-ray short nullable u_flux_ap90_hi Upper Limit of Net Energy Flux from PSF 90% ECF Aperture in ACIS Ultrasoft Band erg/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.soft double nullable y_offset Sky Coordinate System Y Translation Correction to Co-Align with Gaia-CRF3 arcsec pos.eq.dec;pos.errorEllipse double nullable m_flux_ap90_hi Upper Limit of Net Energy Flux from PSF 90% ECF Aperture in ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.medium double nullable h_photflux_ap90_hi Upper Limit of Net Photon Flux from PSF 90% ECF Aperture in ACIS Hard Band photon/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.medium double nullable m_flux_ap90_lo Lower Limit of Net Energy Flux from PSF 90% ECF Aperture in ACIS Medium Band erg/s/cm^2 stat.error;phot.flux;stat.min;em.X-ray.medium double nullable w_src_area Area of the Deconvolved Detection Extent Ellipse or Polygon in HRC Wide Band arcsec^2 phys.angArea;em.X-ray double nullable b_count_rate_ap90 Net Count Rate from PSF 90% ECF Aperture in ACIS Broad Band ct/s phot.count;em.X-ray double nullable w_detect_significance Significance of Detection in the HRC Wide (~0.1-10.0 keV) Energy Band stat.likelihood;phot.count;em.X-ray double nullable error_ellipse_r0 Major Radius of the 95% Confidence Level Position Error Ellipse arcsec phys.angSize.smajAxis;pos.errorEllipse double nullable m_minor_axis 1-Sigma Radius Along Minor Axis of Extent in ACIS Medium Band arcsec phys.angSize.sminAxis;em.X-ray.medium double nullable u_counts_ap90 Net Counts from PSF 90% ECF Aperture for ACIS Ultrasoft (0.2-0.5 keV) Band ct phot.count;em.X-ray.soft double nullable w_minor_axis_hi Upper Limit of Minor Axis of Extent in HRC Wide Band arcsec stat.error;phys.angSize.sminAxis;stat.max;em.X-ray double nullable w_count_rate_ap_hi Upper Limit of Net Count Rate from Source Region Aperture in HRC Wide Band ct/s stat.error;phot.count;stat.max;em.X-ray double nullable h_photflux_ap_hi Upper Limit of Net Photon Flux from Source Region Aperture in ACIS Hard Band photon/s/cm^2 stat.error;phot.flux;stat.max;em.X-ray.medium double nullable create_date Creation Date/Time of the Level 3 Detect Stack Event Data File (UTC) mjd time.creation double nullable h_counts_ap_hi Upper Limit of Net Counts in ACIS Hard (2.0-7.0 keV) Energy Band ct stat.error;phot.count;stat.max;em.X-ray.medium double nullable h_counts_ap90 Net Counts from PSF 90% ECF Aperture for ACIS Hard (2.0-7.0 keV) Energy Band ct phot.count;em.X-ray.medium double nullable u_position_angle_hi Upper Limit of Position Angle of Major Axis of Extent in ACIS Ultrasoft Band degree stat.error;pos.posAng;stat.max;em.X-ray.soft double nullable h_position_angle_lo Lower Limit of Position Angle of Major Axis of Extent in ACIS Hard Band degree stat.error;pos.posAng;stat.min;em.X-ray.medium double 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