XMM-Newton Serendipitous Source Catalog: 5XMM-DR15 Full (Stacked) Catalog

XMM-Newton Serendipitous Source Catalog: 5XMM-DR15 Full (Stacked) Catalog XMMSTACK ivo://nasa.heasarc/xmmstack NASA/GSFC HEASARC XMM-Newton SSC Consortium 2026-07-10 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The XMMSTACK table contains the complete Fifth XMM-Newton Serendipitous Source Catalog. The 5XMM-DR15 is the fifth generation catalog of serendipitous X-ray sources from the European Space Agency's (ESA) XMM-Newton observatory, and has been created by the XMM-Newton Survey Science Center (SSC) in collaboration with the XMM-Newton Science Operations Center (SOC) on behalf of ESA. For this fifth generation of catalogs, only a stacked catalog of sources (with the individual detections and upper limits) is provided. This stacked catalog uses improved stacking methodology which allows all the individual observations to be included, contrary to stacked versions prior to 5XMM-DR15. The catalog contains source detections drawn from a total of 14,616 XMM-Newton EPIC observations made between 2000 January 19 and 2024 October 14; all datasets included were publicly available by 2024 October 31 but not all public observations are included in this catalog. This is due to some observations having very poor signal to noise or processing issues. The net area of the catalog fields taking account of the substantial overlaps between observations is ~1397 deg2. 5XMM-DR15 contains 818,656 unique X-ray sources and 2,578,752 X-ray detections or upper limits above the processing likelihood threshold (column STACK_DET_ML) of 6. Almost half of all sources (411,307) have more than one detection in the catalog (up to 98 repeat observations in the most extreme case). The catalog distinguishes between extended emission and point-like detections. Parameters of detections of extended sources are only reliable up to the maximum extent measure of 80 arcseconds. There are 42,669 detections of extended emission, only about half of the number in 4XMM-DR14, but twice the number of 'clean' extended sources in 4XMM-DR14. This can be understood by the improved signal to noise in 5XMM-DR15 which is a stacked catalog, which ensures that extended sources are more reliably identified. Indeed more than 60% of the extended sources in 5XMM-DR15 (25,845) are identified as clean (SUM_FLAG < 3). Due to intrinsic features of the instrumentation as well as some shortcomings of the source detection process, some detections are considered to be spurious or their parameters are considered to be unreliable. It is recommended to use a flag as filters to obtain what can be considered a 'clean' sample. There are 764,140 out of 818,656 sources that are considered to be clean (i.e., SUM_FLAG < 3). For 408,694 detections, EPIC time series and 408,901 detections, EPIC spectra were automatically extracted during processing, and a chi2-variability test was applied to the time series. This is a significant increase since 4XMM-DR14 as these products are now extracted for detections with 50 EPIC counts, whereas 100 EPIC counts were previously required. 12,330 detections in the catalog are considered variable, within the timespan of the specific observation, at a probability of 10-5 or less based on the null-hypothesis that the source is constant. Of these, 10,907 have a SUM_FLAG < 3. On the long-term, 41,187 sources have a variability of a factor five or greater. The median flux (in the total photon-energy band 0.2 - 12 keV) of the catalog detections is ~ 1.3 x 10-14 erg/cm2/s; in the soft energy band (0.2 - 2 keV) the median flux is ~ 2.9 x 10-15, and in the hard band (2 - 12 keV) it is ~7.6 x 10-15. The flux values from the three EPIC cameras are, overall, in agreement to ~10% for most energy bands. The median positional accuracy of the catalog point source detections is generally < 1.52 arcseconds (with a standard deviation of 1.41 arcseconds). To maintain similar structure as prior to the 5XMM release, the HEASARC now provides the sources-only subset of 5XMM-DR15 as <a href="/W3Browse/xmm-newton/xmmssc.html">XMMSSC</a>, which contains one row per unique source, for the 818,656 sources. This catalog, XMMSTACK, is the complete version of the catalog and has one row per source, followed by subsequent rows with information stemming from each detection or upper limit and thus has 3,397,248 rows. They both have the same number of columns (421). The catalog also contains a column with links to the IRAP catalog server summary pages. In the case of sources with multiple detections, the summary page of the best detection is selected (i.e., the detection with the largest exposure time, summed over all cameras), and the summary page gives cross-links to the other detections. The energy bands used in the 5XMM-DR15 processing were the same as for the 3XMM and 4XMM catalogs. The following are the basic energy bands: <pre> 1 = 0.2 - 0.5 keV 2 = 0.5 - 1.0 keV 3 = 1.0 - 2.0 keV 4 = 2.0 - 4.5 keV 5 = 4.5 - 12.0 keV </pre> while these are the broad energy bands: <pre> 6 = 0.2 - 2.0 keV soft band, no images made 7 = 2.0 - 12.0 keV hard band, no images made 8 = 0.2 - 12.0 keV total band </pre> This database table was last updated by the HEASARC in June 2026. It contains the 5XMM-DR15 complete catalog, released by ESA on 2026-06-09 and obtained from the XMM-Newton Survey Science Center Consortium at <a href="http://xmmssc.irap.omp.eu/Catalogue/5XMM-DR15/5XMM_DR15.html">http://xmmssc.irap.omp.eu/Catalogue/5XMM-DR15/5XMM_DR15.html</a>. It is also available as a gzipped FITS file at <a href="https://heasarc.gsfc.nasa.gov/FTP/xmm/data/catalogues/5XMM_DR15cat_v1.0.fits.gz">https://heasarc.gsfc.nasa.gov/FTP/xmm/data/catalogues/5XMM_DR15cat_v1.0.fits.gz</a>. The previous versions of the Serendipitous Source Catalog, 3XMM-DR5, 3XMM-DR6, 3XMM-DR7, 3XMM-DR8, 4XMM-DR9, 4XMM-DR10, 4XMM-DR11, 4XMM-DR12, 4XMM-DR13, and 4XMM-DR14 are also available in the same directory for comparison purposes as the files 3XMM_DR5cat_v1.0.fits.gz, 3XMM_DR6cat_v1.0.fits.gz, 3XMM_DR7cat_v1.0.fits.gz, 3XMM_DR8_cat_v1.0.fits.gz, 4XMM_DR9_cat_v1.0.fits.gz, 4XMM_DR10cat_v1.0.fits.gz, 4XMM_DR11cat_v1.0.fits.gz, 4XMM_DR12cat_v1.0.fits.gz, 4XMM_DR13cat_v1.0.fits.gz, and 4XMM_DR14cat_v1.0.fits.gz, respectively. This is a service provided by NASA HEASARC . 2009A&A...493..339W https://heasarc.gsfc.nasa.gov/W3Browse/all/xmmstack.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=xmmstack& GET text/xml 180 99999 true 64.9257605423087 55.9994027408255 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=xmmstack GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_xmmstack&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 X-ray public xmmstack XMM-Newton Serendipitous Source Catalog: 5XMM-DR15 Full (Stacked srcid Unique Source Identifier meta.id;src char nullable name Source Designation (IAU) meta.id;meta.main char nullable ra Corrected Right Ascension of the Source degree pos.eq.ra;meta.main double nullable dec Corrected Declination of the Source degree pos.eq.dec;meta.main double nullable ep_flux EPIC Total Band Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable ep_flux_error Uncertainty in EPIC Total Band Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable pn_flux PN Total Band Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable pn_flux_error Uncertainty in PN Total Band Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable m1_flux M1 Total Band Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable m1_flux_error Uncertainty in M1 Total Band Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable m2_flux M2 Total Band Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable m2_flux_error Uncertainty in M2 Total Band Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable "time" Date of Earliest Observation Containing a Detection of the Unique Source mjd time.start;obs double nullable end_time Date of Latest Observation Containing a Detection of a Unique Source mjd time.end;obs double nullable pn_offax Distance between Detection Position and On-Axis Position of PN Detector (arcmin) arcmin instr.offset double nullable m1_4_flux M1 Band 4 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.medium double nullable m1_hr4_error Uncertainty in M1 Hardness Ratio for Bands 4 and 5 stat.error;phot.flux;arith.ratio;em.X-ray.medium double nullable ep_rate_error Uncertainty in EPIC Total Band Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray double nullable ep_hr3 EPIC Hardness Ratio for Bands 3 and 4 phot.flux;arith.ratio double nullable pn_flag EPIC/PN Detection Quality Flags meta.code char nullable ep_det_ml EPIC Total Band Detection Likelihood stat.likelihood;instr.bandpass double nullable m2_hr1_error Uncertainty in M2 Hardness Ratio for Bands 1 and 2 stat.error;phot.flux;arith.ratio;em.X-ray.soft double nullable m1_4_rate_error Uncertainty in M1 Band 4 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.medium double nullable m1_3_flux_error Uncertainty in M1 Band 3 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable stack_gamma_neg_err Lower 1-Sigma Uncertainty on STACK_GAMMA stat.error;stat.min;stat.fit.param;spect.index double nullable pn_5_rate_error Uncertainty in PN Band 5 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.medium double nullable pn_maskfrac PSF Weighted Mean of PN Detector Coverage of a Detection meta.code;instr.det double nullable m2_3_vig M2 Band 3 Vignetting Value instr.bandpass double nullable ep_cts_error Uncertainty in EPIC Total Band Source Counts ct stat.error;phot;em.X-ray double nullable m2_hr2 M2 Hardness Ratio for Bands 2 and 3 phot.flux;arith.ratio;em.X-ray.soft double nullable n_obs Total Number of Observations per Stack meta.number;obs int nullable var_chi2_5 Reduced Chi Squared of EPIC Band 5 Inter-Observation Variability stat.fit.chi2;src.var double nullable om_uvw1_ab_mag OM UVW1 Band Magnitude (AB System) phot.mag;em.UV.200-300nm double nullable m2_1_bg M2 Band 1 Background Map Value (ct/pixel) ct/pixel instr.background double nullable spec_nh_pl EPIC-Equivalent Hydrogen Column Density NH from Absorbed Power Law Fit cm^-2 stat.fit.param;em.X-ray;meta.modelled double nullable pn_2_vig PN Band 2 Vignetting Value instr.bandpass double nullable pn_rawy Y Raw Pixel Position of Detection in PN Image pos.cartesian.y;instr.pixel short nullable classx_class Output Class Given by the X-Ray Source Classification src.class;em.X-ray char nullable wise_w3mag_error WISE W3 Band Source Magnitude Uncertainty (AB System) mag stat.error;phot.mag;em.IR.8-15um double nullable pn_5_bg PN Band 5 Background Map Value (ct/pixel) ct/pixel instr.background double nullable pn_hr2_error Uncertainty in PN Hardness Ratio for Bands 2 and 3 stat.error;phot.flux;arith.ratio;em.X-ray.soft double nullable m1_2_bg M1 Band 2 Background Map Value (ct/pixel) ct/pixel instr.background double nullable om_b_ab_mag_error OM B Band Magnitude Uncertainty (AB System) stat.error;phot.mag;em.opt.B double nullable m2_4_rate_error Uncertainty in M2 Band 4 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.medium double nullable ep_cts EPIC Total Band Source Counts ct phot;em.X-ray double nullable pn_2_rate_error Uncertainty in PN Band 2 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable var_prob_1 Probability That EPIC Band 1 Flux Variability Is Consistent stat.probability;src.var double nullable wise_w1mag WISE W1 Band Source Magnitude (AB System) mag phot.mag;em.IR.3-4um double nullable fratio_1 Maximum EPIC Band 1 Inter-Observation Flux Ratio src.var.amplitude;phot.flux;em.X-ray.soft double nullable m2_5_rate_error Uncertainty in M2 Band 5 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.medium double nullable fluxvar_3 Maximum EPIC Inter-Observation Band 3 Flux Difference in Terms of Sigma sigma stat.stdev;phot.flux;em.X-ray.soft double nullable m1_1_rate_error Uncertainty in M1 Band 1 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable pn_2_ecf Energy Conversion Factor for PN in the 0.5-1.0 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable var_chi2_1 Reduced Chi Squared of EPIC Band 1 Inter-Observation Variability stat.fit.chi2;src.var double nullable ep_3_flux_error Uncertainty in EPIC Band 3 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable m1_2_rate M1 Band 2 Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable classopt_class Output Class Given by the Optical Source Classification src.class;em.opt char nullable fratio_4 Maximum EPIC Band 4 Inter-Observation Flux Ratio src.var.amplitude;phot.flux;em.X-ray.medium double nullable extent_ml Extent Likelihood stat.likelihood;phys.angSize double nullable n_exp Number of Exposures Covering the Source meta.number short nullable n_blend Number of Simultaneously Fit Sources Taking into Account Blended Sources meta.number short nullable spec_pvalue_pl Pvalue of Absorbed Power Law Full Spectral Fit stat.fit.goodness;stat.probability double nullable m1_5_ecf Energy Conversion Factor for MOS1 in the 4.5-12.0 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable extent Extent Radius (arcsec) arcsec phys.angSize double nullable m1_filter Type of MOS1 Filter Used instr;instr.filter;em.X-ray.medium char nullable approx_source_var Long-Term Variability Factor Obtained from Multiple X-Ray Mission Data src.var.index;em.X-ray double nullable pn_4_flux PN Band 4 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.medium double nullable om_uvm2_ab_mag OM UVM2 Band Magnitude (AB System) phot.mag;em.UV.200-300nm double nullable m1_bg M1 Total Band Background Map Value (ct/pixel) ct/pixel instr.background double nullable wise_w3mag WISE W3 Band Source Magnitude (AB System) mag phot.mag;em.IR.8-15um double nullable x_pixel X Coordinate of Combined Observation of a Stack pixel pos.cartesian.x;instr.pixel double nullable pn_2_exposure PN Band 2 Exposure Map (s) s time.duration;obs.exposure double nullable obsid Unique Observation Identifier meta.id;obs char nullable pn_1_det_ml PN Band 1 Detection Likelihood stat.likelihood;instr.bandpass double nullable redshift_lph_z_best Redshift determined using the LePhare Method src.redshift double nullable redshift_zsp Spectral Redshift src.redshift double nullable m1_4_ecf Energy Conversion Factor for MOS1 in the 2.0-4.5 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable m2_5_vig M2 Band 5 Vignetting Value instr.bandpass double nullable gaiadr3_pm_dec Gaia DR3 Catalog Source Declination Proper Motion mas/yr pos.pm;pos.eq.dec double nullable m2_cts_error Uncertainty in M2 Total Band Source Counts ct stat.error;phot;em.X-ray double nullable m1_4_exposure M1 Band 4 Exposure Map (s) s time.duration;obs.exposure double nullable om_u_extended_flag OM U Band Extent Flag: 1=Extended meta.code;src;phys.angSize;em.opt.U char nullable var_prob_5 Probability That EPIC Band 5 Flux Variability Is Consistent stat.probability;src.var double nullable m1_offax Distance between Detection Position and On-Axis Position of M1 Detector (arcmin) arcmin instr.offset double nullable pn_5_exposure PN Band 5 Exposure Map (s) s time.duration;obs.exposure double nullable spec_iin_pl_neg_err Lower 1-Sigma Confidence Limit of EPIC Inter-Instrument Normalization stat.error;stat.min;stat.fit.param;em.X-ray;meta.modelled double nullable dist_nn Distance to the Nearest Neighbor arcsec pos.angDistance double nullable spec_iin_pl EPIC Inter-Instrument Normalization from Absorbed Power Law Full Spectrum Fit stat.fit.param;em.X-ray;meta.modelled double nullable ep_1_flux EPIC Band 1 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable fratio_5 Maximum EPIC Band 5 Inter-Observation Flux Ratio src.var.amplitude;phot.flux;em.X-ray.medium double nullable m1_5_rate M1 Band 5 Count Rate (ct/s) ct/s phot.count;em.X-ray.medium double nullable ep_flag EPIC Detection Quality Flags Combining PN, MOS1, and MOS2 Flags meta.code char nullable ccdm1 M1 CCD Number in Which Detection Lies meta.id;instr short nullable spec_dof_pl Degrees of Freedom of Absorbed Power Law Full Spectral Fit stat.fit.dof int nullable m2_hr1 M2 Hardness Ratio for Bands 1 and 2 phot.flux;arith.ratio;em.X-ray.soft double nullable m1_5_det_ml M1 Band 5 Detection Likelihood stat.likelihood;instr.bandpass double nullable m2_1_flux M2 Band 1 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable pn_hr2 PN Hardness Ratio for Bands 2 and 3 phot.flux;arith.ratio;em.X-ray.soft double nullable ep_hr2 EPIC Hardness Ratio for Bands 2 and 3 phot.flux;arith.ratio;em.X-ray.soft double nullable pn_3_vig PN Band 3 Vignetting Value instr.bandpass double nullable m2_3_det_ml M2 Band 3 Detection Likelihood stat.likelihood;instr.bandpass double nullable pn_1_rate PN Band 1 Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable om_uvm2_extended_flag OM UVM2 Band Extent Flag: 1=Extended meta.code;src;phys.angSize;em.UV.200-300nm char nullable om_uvw2_chisq OM UVW2 Band Variability Measure stat.fit.chi2;src.var;em.UV.200-300nm double nullable sum_flag Summary Flag of the Source: 0=Good, 1=Warning, 2=Possibly Spurious meta.code.qual short nullable m1_1_ecf Energy Conversion Factor for MOS1 in the 0.2-0.5 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable stack_nh_neg_err Lower 1-Sigma Uncertainty on STACK_NH cm^-2 stat.error;stat.min;phys.columnDensity double nullable pn_4_rate_error Uncertainty in PN Band 4 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.medium double nullable pn_3_det_ml PN Band 3 Detection Likelihood stat.likelihood;instr.bandpass double nullable m2_1_rate M2 Band 1 Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable spec_gamma_pl_pos_err Upper 1-Sigma Confidence Limit of EPIC Photon Index stat.error;stat.max;stat.fit.param;em.X-ray;meta.modelled double nullable pn_2_flux PN Band 2 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable y_pixel_neg_err Lower 1-Sigma Asymmetrical Uncertainty in Y Coordinate of Stacked Observation pixel stat.error;pos.cartesian.y;instr.pixel double nullable m1_3_rate_error Uncertainty in M1 Band 3 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable pn_cts PN Total Band Source Counts ct phot;em.X-ray double nullable m2_1_vig M2 Band 1 Vignetting Value instr.bandpass double nullable pn_5_vig PN Band 5 Vignetting Value instr.bandpass double nullable m2_4_flux M2 Band 4 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.medium double nullable spectra_flag Boolean Flag [T/F] Indicates Source Has a Spectrum in at Least One Exposure meta.code;spect char nullable fluxvar_4 Maximum EPIC Inter-Observation Band 4 Flux Difference in Terms of Sigma sigma stat.stdev;phot.flux;em.X-ray.medium double nullable wise_name WISE All-Sky Release Catalog Source Designation meta.id;src char nullable m2_2_det_ml M2 Band 2 Detection Likelihood stat.likelihood;instr.bandpass double nullable m1_5_rate_error Uncertainty in M1 Band 5 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.medium double nullable y_pixel_pos_err Upper 1-Sigma Asymmetrical Uncertainty in Y Coordinate of Stacked Observation pixel stat.error;pos.cartesian.y;instr.pixel double nullable m2_det_ml M2 Total Band Detection Likelihood stat.likelihood;instr.bandpass double nullable wise_w2mag WISE W2 Band Source Magnitude (AB System) mag phot.mag;em.IR.4-8um double nullable ep_2_flux_error Uncertainty in EPIC Band 2 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable om_uvw1_chisq_dof OM UVW1 Band Variability Measure Degrees of Freedom stat.fit.dof;src.var;em.UV.200-300nm double nullable error_ell_pa Rotation Angle of the Positional Error Ellipse degree stat.error;pos.posAng double nullable y_pixel_error Symmetrical Uncertainty in Y Coordinate of Combined Observation of a Stack pixel stat.error;pos.cartesian.y;instr.pixel double nullable pn_5_ecf Energy Conversion Factor for PN in the 4.5-12.0 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable stack_det_ml Detection Maximum Likelihood Using Fitting of the 5-Band Spectrum stat.likelihood double nullable gaiadr3_gmag Gaia DR3 Catalog Source g Magnitude mag phot.mag;em.opt double nullable m1_2_ecf Energy Conversion Factor for MOS1 in the 0.5-1.0 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable fratio Maximum EPIC Inter-Observation Flux Ratio Band 0.2-12.0 keV src.var.amplitude;phot.flux;em.X-ray double nullable pn_hr4 PN Hardness Ratio for Bands 4 and 5 phot.flux;arith.ratio;em.X-ray.medium double nullable x_pixel_pos_err Upper 1-Sigma Asymmetrical Uncertainty in X Coordinate of Stacked Observation pixel stat.error;pos.cartesian.x;instr.pixel double nullable om_uvw2_quality_flag OM UVW2 Band Quality Flag meta.code.qual;em.UV.200-300nm int nullable m2_3_flux_error Uncertainty in M2 Band 3 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable fratio_4_error 1-Sigma Uncertainty on FRATIO_4 stat.error;src.var.amplitude;phot.flux double nullable om_b_chisq OM B Band Variability Measure stat.fit.chi2;src.var;em.opt.B double nullable om_u_ab_mag_error OM U Band Magnitude Uncertainty (AB System) stat.error;phot.mag;em.opt.U double nullable m1_submode MOS1 Observing Mode instr.setup char nullable m2_2_rate M2 Band 2 Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable pn_2_flux_error Uncertainty in PN Band 2 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable pn_hr3 PN Hardness Ratio for Bands 3 and 4 phot.flux;arith.ratio;em.X-ray.medium;em.X-ray.soft double nullable m1_4_det_ml M1 Band 4 Detection Likelihood stat.likelihood;instr.bandpass double nullable m1_1_det_ml M1 Band 1 Detection Likelihood stat.likelihood;instr.bandpass double nullable gaiadr3_rpmag Gaia DR3 Catalog Source Rp Magnitude mag phot.mag;em.opt.R double nullable m2_1_exposure M2 Band 1 Exposure Map (s) s time.duration;obs.exposure double nullable m1_2_vig M1 Band 2 Vignetting Value instr.bandpass double nullable var_chi2_4 Reduced Chi Squared of EPIC Band 4 Inter-Observation Variability stat.fit.chi2;src.var double nullable stack_nh_pos_err Upper 1-Sigma Uncertainty on STACK_NH cm^-2 stat.error;stat.max;phys.columnDensity double nullable pn_5_rate PN Band 5 Count Rate (ct/s) ct/s phot.count;em.X-ray.medium double nullable pn_1_flux PN Band Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable ep_5_flux_error Uncertainty in EPIC Band 5 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.medium double nullable om_u_quality_flag OM U Band Quality Flag meta.code.qual;em.opt.U int nullable om_uvw2_chisq_dof OM UVW2 Band Variability Measure Degrees of Freedom stat.fit.dof;src.var;em.UV.200-300nm double nullable m2_1_flux_error Uncertainty in M2 Band 1 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable classx_outlier X-Ray Classification Outlier Measure src.class;stat.value;em.X-ray double nullable pn_rawx X Raw Pixel Position of Detection in PN Image pos.cartesian.x;instr.pixel short nullable m2_filter Type of MOS2 Filter Used instr;instr.filter;em.X-ray.soft char nullable fratio_3 Maximum EPIC Band 3 Inter-Observation Flux Ratio src.var.amplitude;phot.flux;em.X-ray.soft double nullable pn_3_flux PN Band 3 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable ccdm2 M2 CCD Number in Which Detection Lies meta.id;instr short nullable classx_prob_agn X-Ray Classification Posterior Probability That the Source Is an AGN src.class;stat.probability;em.X-ray double nullable m1_3_exposure M1 Band 3 Exposure Map (s) s time.duration;obs.exposure double nullable pn_pileup Estimate of the Pile-Up Level in EPIC/pn stat.value double nullable pn_3_bg PN Band 3 Background Map Value (ct/pixel) ct/pixel instr.background double nullable var_chi2_2 Reduced Chi Squared of EPIC Band 2 Inter-Observation Variability stat.fit.chi2;src.var double nullable spec_nh_pl_pos_err Upper 1-Sigma Confidence Limit of EPIC NH cm^-2 stat.error;stat.max;stat.fit.param;em.X-ray;meta.modelled double nullable gaiadr3_parallax Gaia DR3 Catalog Source Parallax mas pos.parallax double nullable m1_det_ml M1 Total Band Detection Likelihood stat.likelihood;instr.bandpass double nullable m1_4_vig M1 Band 4 Vignetting Value instr.bandpass double nullable m1_4_flux_error Uncertainty in M1 Band 4 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.medium double nullable m2_2_exposure M2 Band 2 Exposure Map (s) s time.duration;obs.exposure double nullable m2_5_flux_error Uncertainty in M2 Band 5 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.medium double nullable pn_4_exposure PN Band 4 Exposure Map (s) s time.duration;obs.exposure double nullable m2_3_rate_error Uncertainty in M2 Band 3 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable ep_rate EPIC Total Band Count Rate (ct/s) ct/s phot.count;em.X-ray double nullable wise_w1mag_error WISE W1 Band Source Magnitude Uncertainty (AB System) mag stat.error;phot.mag;em.IR.3-4um double nullable ep_hr1 EPIC Hardness Ratio for Bands 1 and 2 phot.flux;arith.ratio;em.X-ray.soft double nullable m1_2_rate_error Uncertainty in M1 Band 2 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable m1_1_exposure M1 Band 1 Exposure Map (s) s time.duration;obs.exposure double nullable ep_hr3_error Uncertainty in EPIC Hardness Ratio for Bands 3 and 4 stat.error;phot.flux;arith.ratio double nullable fratio_3_error 1-Sigma Uncertainty on FRATIO_3 stat.error;src.var.amplitude;phot.flux double nullable m2_ontime M2 Total Good Exposure Time (After GTI Filtering) of the CCD s time.duration;obs.exposure double nullable pn_3_exposure PN Band 3 Exposure Map (s) s time.duration;obs.exposure double nullable pn_4_det_ml PN Band 4 Detection Likelihood stat.likelihood;instr.bandpass double nullable var_flag Flag [T/F] Indicates Source Was Detected as Variable in at Least One Exposure meta.code;src.var char nullable m1_2_flux M1 Band 2 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable m2_5_flux M2 Band 5 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.medium double nullable m2_2_vig M2 Band 2 Vignetting Value instr.bandpass double nullable om_uvw1_chisq OM UVW1 Band Variability Measure stat.fit.chi2;src.var;em.UV.200-300nm double nullable fvar Fractional Excess Variance of Timeseries for the Detection stat.variance;src.var double nullable extent_neg_err Uncertainty in Extent Radius (arcsec) arcsec stat.error;stat.min;phys.angSize double nullable m1_5_vig M1 Band 5 Vignetting Value instr.bandpass double nullable pn_1_exposure PN Band 1 Exposure Map (s) s time.duration;obs.exposure double nullable pn_submode PN Observing Mode instr.setup char nullable m2_rawy Y Raw Pixel Position of Detection in M2 Image pos.cartesian.y;instr.pixel short nullable error_radius Positional Uncertainty (arcsec) arcsec stat.error;pos;stat.mean double nullable gaiadr3_parallax_overerr Gaia DR3 Catalog Source Parallax Over Error stat.snr;pos.parallax double nullable m1_3_vig M1 Band 3 Vignetting Value instr.bandpass double nullable m1_3_bg M1 Band 3 Background Map Value (ct/pixel) ct/pixel instr.background double nullable pn_2_det_ml PN Band 2 Detection Likelihood stat.likelihood;instr.bandpass double nullable y_pixel Y Coordinate of Combined Observation of a Stack pixel pos.cartesian.y;instr.pixel double nullable m1_1_rate M1 Band 1 Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable stack_flux Mean Flux of Spectral Detection Using Fitting of the 5-Band Spectrum erg/cm^2/s phot.flux;em.X-ray double nullable m1_maskfrac PSF Weighted Mean of M1 Detector Coverage of a Detection meta.code;instr.det double nullable ccdpn PN CCD Number in Which the Detection Lies meta.id;instr short nullable stack_gamma_pos_err Upper 1-Sigma Uncertainty on STACK_GAMMA stat.error;stat.max;stat.fit.param;spect.index double nullable m1_5_flux M1 Band 5 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.medium double nullable m2_2_flux M2 Band 2 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable m1_rawx X Raw Pixel Position of Detection in M1 Image pos.cartesian.x;instr.pixel short nullable extent_pos_err Uncertainty in Extent Radius (arcsec) arcsec stat.error;stat.max;phys.angSize double nullable classx_prob_gal_xrb X-Ray Classification Posterior Probability That the Source Is a Galaxy src.class;stat.probability;em.X-ray double nullable ep_4_flux_error Uncertainty in EPIC Band 4 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.medium double nullable pn_4_flux_error Uncertainty in PN Band 4 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.medium double nullable pn_bg PN Total Band Background Map Value (ct/pixel) ct/pixel instr.background double nullable om_u_chisq OM U Band Variability Measure stat.fit.chi2;src.var;em.opt.U double nullable m1_cts M1 Total Band Source Counts ct phot.count;em.X-ray double nullable spec_gamma_pl EPIC Photon Index from Absorbed Power Law Full Spectral Fit stat.fit.param;em.X-ray;meta.modelled double nullable xmm_revolution XMM-Newton Revolution (Orbit) Number meta.id int nullable bii Corrected Galactic Latitude of the Source (degrees) degree pos.galactic.lat double nullable m1_hr3_error Uncertainty in M1 Hardness Ratio for Bands 3 and 4 stat.error;phot.flux;arith.ratio;em.X-ray.medium;em.X-ray.soft double nullable x_pixel_neg_err Lower 1-Sigma Asymmetrical Uncertainty in X Coordinate of Stacked Observation pixel stat.error;pos.cartesian.x;instr.pixel double nullable m2_rate_error Uncertainty in M2 Total Band Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable om_v_ab_mag_error OM V Band Magnitude Uncertainty (AB System) stat.error;phot.mag;em.opt.V double nullable ep_2_flux EPIC Band 2 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable om_uvm2_quality_flag OM UVM2 Band Quality Flag meta.code.qual;em.UV.200-300nm int nullable m2_4_rate M2 Band 4 Count Rate (ct/s) ct/s phot.count;em.X-ray.medium double nullable pn_rate_error Uncertainty in PN Total Band Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable om_uvw2_extended_flag OM UVW2 Band Extent Flag: 1=Extended meta.code;src;phys.angSize;em.UV.200-300nm char nullable m1_1_bg M1 Band 1 Background Map Value (ct/pixel) ct/pixel instr.background double nullable spec_flag_pl Flag That Indicates Possible Issues with Power Law Spectral Fit meta.code.qual int nullable fratio_2_error 1-Sigma Uncertainty on FRATIO_2 stat.error;src.var.amplitude;phot.flux double nullable om_match_prob Probability That the OM and X-Ray Sources Match stat.probability;src double nullable fratio_1_error 1-Sigma Uncertainty on FRATIO_1 stat.error;src.var.amplitude;phot.flux double nullable redshift_tpz_flag_zconf Confidence Limit on Redshift Using the TPZ Method meta.code.qual;src.redshift double nullable m2_3_exposure M2 Band 3 Exposure Map (s) s time.duration;obs.exposure double nullable classx_prob_gal_cv X-Ray Classification Posterior Probability That the Source Is a CV src.class;stat.probability;em.X-ray double nullable m1_5_bg M1 Band 5 Background Map Value (ct/pixel) ct/pixel instr.background double nullable om_uvw1_ab_mag_error OM UVW1 Band Magnitude Uncertainty (AB System) stat.error;phot.mag;em.UV.200-300nm double nullable m2_4_ecf Energy Conversion Factor for MOS2 in the 2.0-4.5 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable spec_gamma_pl_neg_err Lower 1-Sigma Confidence Limit of EPIC Photon Index stat.error;stat.min;stat.fit.param;em.X-ray;meta.modelled double nullable m1_3_ecf Energy Conversion Factor for MOS1 in the 1.0-2.0 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable classopt_prob_agn Optical Classification Posterior Probability That the Source Is an AGN src.class;stat.probability;em.opt double nullable stack_flux_error 1-Sigma Symmetric Error on Mean Flux of Spectral Detection Using Fitting erg/cm^2/s stat.error;phot.count;em.X-ray double nullable pps_srcnum Source Number Attributed to a Detection by the Automatic Pipeline Processing meta.id int nullable ep_hr4 EPIC Hardness Ratio for Bands 4 and 5 phot.flux;arith.ratio;em.X-ray.medium double nullable error_ell_minor Semi-Minor Axis of the Positional Error Ellipse arcsec phys.angSize.sminAxis;pos.errorEllipse double nullable classopt_prob_star Optical Classification Posterior Probability That the Source Is a Star src.class;stat.probability;em.opt double nullable m2_maskfrac PSF Weighted Mean of M2 Detector Coverage of a Detection meta.code;instr.det double nullable m1_pileup Estimate of the Pile-Up Level in EPIC/MOS1 stat.value double nullable m2_rawx X Raw Pixel Position of Detection in M2 Image pos.cartesian.x;instr.pixel short nullable m2_2_rate_error Uncertainty in M2 Band 2 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable m1_4_rate M1 Band 4 Count Rate (ct/s) ct/s phot.count;em.X-ray.medium double nullable m2_4_exposure M2 Band 4 Exposure Map (s) s time.duration;obs.exposure double nullable var_chi2_3 Reduced Chi Squared of EPIC Band 3 Inter-Observation Variability stat.fit.chi2;src.var double nullable gaiadr3_parallax_error Gaia DR3 Catalog Source Parallax Uncertainty mas stat.error;pos.parallax double nullable om_b_chisq_dof OM B Band Variability Measure Degrees of Freedom stat.fit.dof;src.var;em.opt.B double nullable pn_1_vig PN Band 1 Vignetting Value instr.bandpass double nullable om_uvw1_extended_flag OM UVW1 Band Extent Flag: 1=Extended meta.code;src;phys.angSize;em.UV.200-300nm char nullable m1_hr1_error Uncertainty in M1 Hardness Ratio for Bands 1 and 2 stat.error;phot.flux;arith.ratio;em.X-ray.soft double nullable n_contrib Number of Observations with Which the Source Was Fitted meta.number int nullable gaiadr3_dist Gaia DR3 Catalog Source Distance pc pos.distance;src double nullable pn_5_flux PN Band 5 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.medium double nullable pn_hr3_error Uncertainty in PN Hardness Ratio for Bands 3 and 4 stat.error;phot.flux;arith.ratio;em.X-ray.medium;em.X-ray.soft double nullable m1_3_det_ml M1 Band 3 Detection Likelihood stat.likelihood;instr.bandpass double nullable m2_1_ecf Energy Conversion Factor for MOS2 in the 0.2-0.5 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable m2_2_ecf Energy Conversion Factor for MOS2 in the 0.5-1.0 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable pn_ontime PN Total Good Exposure Time (After GTI Filtering) of the CCD s time.duration;obs.exposure double nullable pn_hr1 PN Hardness Ratio for Bands 1 and 2 phot.flux;arith.ratio;em.X-ray.soft double nullable pn_hr4_error Uncertainty in PN Hardness Ratio for Bands 4 and 5 stat.error;phot.flux;arith.ratio;em.X-ray.medium double nullable m2_hr3 M2 Hardness Ratio for Bands 3 and 4 phot.flux;arith.ratio;em.X-ray.medium;em.X-ray.soft double nullable pn_5_flux_error Uncertainty in PN Band 5 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.medium double nullable m2_offax Distance between Detection Position and On-Axis Position of M2 Detector (arcmin) arcmin instr.offset double nullable fluxvar_5 Maximum EPIC Inter-Observation Band 5 Flux Difference in Terms of Sigma sigma stat.stdev;phot.flux;em.X-ray.medium double nullable stack_gamma_error 1-Sigma Uncertainty on STACK_GAMMA stat.error;stat.fit.param;spect.index double nullable m2_3_bg M2 Band 3 Background Map Value (ct/pixel) ct/pixel instr.background double nullable extent_error Uncertainty in Extent Radius (arcsec) arcsec stat.error;phys.angSize double nullable m1_hr4 M1 Hardness Ratio for Bands 4 and 5 phot.flux;arith.ratio;em.X-ray.medium double nullable m1_rawy Y Raw Pixel Position of Detection in M1 Image pos.cartesian.y;instr.pixel short nullable stack_flux_neg_err Lower 1-Sigma Asymmetric Error on Mean Flux of Spectral Detection Using Fitting erg/cm^2/s stat.error;stat.min;phot.count;em.X-ray double nullable gaiadr3_bpmag Gaia DR3 Catalog Source Bp Magnitude mag phot.mag;em.opt.B double nullable m2_flag EPIC/MOS2 Detection Quality Flags meta.code char nullable pn_rate PN Total Band Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable pn_4_ecf Energy Conversion Factor for PN in the 2.0-4.5 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable error_ell_major Semi-Major Axis of the Positional Error Ellipse arcsec phys.angSize.smajAxis;pos.errorEllipse double nullable om_uvm2_chisq OM UVM2 Band Variability Measure stat.fit.chi2;src.var;em.UV.200-300nm double nullable m2_5_ecf Energy Conversion Factor for MOS2 in the 4.5-12.0 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable m2_5_exposure M2 Band 5 Exposure Map (s) s time.duration;obs.exposure double nullable om_u_chisq_dof OM U Band Variability Measure Degrees of Freedom stat.fit.dof;src.var;em.opt.U double nullable m2_hr2_error Uncertainty in M2 Hardness Ratio for Bands 2 and 3 stat.error;phot.flux;arith.ratio;em.X-ray.soft double nullable m1_3_flux M1 Band 3 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable pn_4_rate PN Band 4 Count Rate (ct/s) ct/s phot.count;em.X-ray.medium double nullable m2_3_flux M2 Band 3 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable wise_w4mag_error WISE W4 Band Source Magnitude Uncertainty (AB System) mag stat.error;phot.mag;em.IR.15-30um double nullable m1_2_flux_error Uncertainty in M1 Band 2 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable pn_5_det_ml PN Band 5 Detection Likelihood stat.likelihood;instr.bandpass double nullable pn_1_bg PN Band 1 Background Map Value (ct/pixel) ct/pixel instr.background double nullable dist_ref Distance to the Reference Coordinates of the Field arcmin pos.distance double nullable om_uvw2_ab_mag OM UVW2 Band Magnitude (AB System) phot.mag;em.UV.200-300nm double nullable m2_3_rate M2 Band 3 Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable pn_filter Type of PN Filter Used instr;instr.filter;em.X-ray char nullable redshift_lph_flag_zconf Confidence limit on redshift using the LePhare Method meta.code.qual;src.redshift double nullable wise_w4mag WISE W4 Band Source Magnitude (AB System) mag phot.mag;em.IR.15-30um double nullable fvar_error Error in Fractional Excess Variance of Timeseries for the Detection stat.error;src.var double nullable m2_bg M2 Total Band Background Map Value (ct/pixel) ct/pixel instr.background double nullable m2_submode MOS2 Observing Mode instr.setup char nullable wise_w2mag_error WISE W2 Band Source Magnitude Uncertainty (AB System) mag stat.error;phot.mag;em.IR.4-8um double nullable stack_nh_error 1-Sigma Uncertainty on STACK_NH cm^-2 stat.error;phys.columnDensity double nullable m2_rate M2 Total Band Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable stack_flux_pos_err Upper 1-Sigma Asymmetric Error on Mean Flux of Spectral Detection Using Fitting erg/cm^2/s stat.error;stat.max;phot.count;em.X-ray double nullable m1_1_vig M1 Band 1 Vignetting Value instr.bandpass double nullable m2_4_det_ml M2 Band 4 Detection Likelihood stat.likelihood;instr.bandpass double nullable var_prob_2 Probability That EPIC Band 2 Flux Variability Is Consistent stat.probability;src.var double nullable om_v_extended_flag OM V Band Extent Flag: 1=Extended meta.code;src;phys.angSize;em.opt.V char nullable om_u_ab_mag OM U Band Magnitude (AB System) phot.mag;em.opt.U double nullable var_prob_3 Probability That EPIC Band 3 Flux Variability Is Consistent stat.probability;src.var double nullable m1_1_flux_error Uncertainty in M1 Band 1 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable ep_hr4_error Uncertainty in EPIC Hardness Ratio for Bands 4 and 5 stat.error;phot.flux;arith.ratio;em.X-ray.medium double nullable m2_1_det_ml M2 Band 1 Detection Likelihood stat.likelihood;instr.bandpass double nullable m2_2_flux_error Uncertainty in M2 Band 2 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable om_b_ab_mag OM B Band Magnitude (AB System) phot.mag;em.opt.B double nullable redshift_info_distance Link to Complementary Information on Distance Determination meta.ref;src.redshift char nullable m2_4_bg M2 Band 4 Background Map Value (ct/pixel) ct/pixel instr.background double nullable pn_3_rate PN Band 3 Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable ep_4_flux EPIC Band 4 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.medium double nullable var_chi2 Reduced Chi Squared of EPIC Band 0.2-12.0 keV Inter-Observation Variability stat.fit.chi2;src.var double nullable ep_ontime EPIC Total Good Exposure Time (After GTI Filtering) of the CCD s time.duration;obs.exposure double nullable gaiadr3_pm_ra Gaia DR3 Catalog Source Right Ascension Proper Motion mas/yr pos.pm;pos.eq.ra double nullable m1_hr3 M1 Hardness Ratio for Bands 3 and 4 phot.flux;arith.ratio;em.X-ray.medium;em.X-ray.soft double nullable pn_3_flux_error Uncertainty in PN Band 3 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable ep_1_flux_error Uncertainty in EPIC Band 1 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable spec_nh_pl_neg_err Lower 1-Sigma Confidence Limit of EPIC NH cm^-2 stat.error;stat.min;stat.fit.param;em.X-ray;meta.modelled double nullable m1_2_exposure M1 Band 2 Exposure Map (s) s time.duration;obs.exposure double nullable m2_4_vig M2 Band 4 Vignetting Value instr.bandpass double nullable pn_1_rate_error Uncertainty in PN Band 1 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable om_v_chisq_dof OM V Band Variability Measure Degrees of Freedom stat.fit.dof;src.var;em.opt.V double nullable m1_3_rate M1 Band 3 Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable tseries_flag Boolean Flag [T/F] Indicates Source Has Time Series in at Least One Exposure meta.code;phot char nullable pn_4_vig PN Band 4 Vignetting Value instr.bandpass double nullable pn_2_rate PN Band 2 Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable chi2prob Chi^2 Probability That Source Is Constant stat.fit.chi2 double nullable m1_5_flux_error Uncertainty in M1 Band 5 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.medium double nullable m1_hr2_error Uncertainty in M1 Hardness Ratio for Bands 2 and 3 stat.error;phot.flux;arith.ratio;em.X-ray.soft double nullable ep_hr2_error Uncertainty in EPIC Hardness Ratio for Bands 2 and 3 stat.error;phot.flux;arith.ratio;em.X-ray.soft double nullable spec_iin_pl_pos_err Upper 1-Sigma Confidence Limit of EPIC Inter-Instrument Normalization stat.error;stat.max;stat.fit.param;em.X-ray;meta.modelled double nullable classopt_prob_galaxy Optical classification Posterior Probability That the Source Is a Galaxy src.class;stat.probability;em.opt double nullable m1_hr2 M1 Hardness Ratio for Bands 2 and 3 phot.flux;arith.ratio;em.X-ray.soft double nullable m1_rate M1 Total Band Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable fratio_5_error 1-Sigma Uncertainty on FRATIO_5 stat.error;src.var.amplitude;phot.flux double nullable m2_1_rate_error Uncertainty in M2 Band 1 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable pn_2_bg PN Band 2 Background Map Value (ct/pixel) ct/pixel instr.background double nullable spec_flux_pl_pos_err Upper 1-Sigma Confidence Limit of EPIC Absorbed Flux erg/cm^2/s stat.error;stat.max;phot.flux;em.X-ray;meta.modelled double nullable stack_gamma Power-law index from fitting of the 5 band spectrum stat.fit.param;spect.index double nullable m2_4_flux_error Uncertainty in M2 Band 4 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.medium double nullable classx_prob_star X-Ray Classification Posterior Probability That the Source Is a Star src.class;stat.probability;em.X-ray double nullable m2_5_bg M2 Band 5 Background Map Value (ct/pixel) ct/pixel instr.background double nullable om_uvw1_quality_flag OM UVW1 Band Quality Flag meta.code.qual;em.UV.200-300nm int nullable pn_4_bg PN Band 4 Background Map Value (ct/pixel) ct/pixel instr.background double nullable x_pixel_error Symmetrical Uncertainty in X Coordinate of Combined Observation of a Stack pixel stat.error;pos.cartesian.x;instr.pixel double nullable m1_2_det_ml M1 Band 2 Detection Likelihood stat.likelihood;instr.bandpass double nullable m2_hr4_error Uncertainty in M2 Hardness Ratio for Bands 4 and 5 stat.error;phot.flux;arith.ratio;em.X-ray.medium double nullable om_uvw2_ab_mag_error OM UVW2 Band Magnitude Uncertainty (AB System) stat.error;phot.mag;em.UV.200-300nm double nullable var_prob_4 Probability That EPIC Band 4 Flux Variability Is Consistent stat.probability;src.var double nullable pn_cts_error Uncertainty in PN Total Band Source Counts ct stat.error;phot;em.X-ray double nullable m1_flag EPIC/MOS1 Detection Quality Flags meta.code char nullable m1_cts_error Uncertainty in M1 Total Band Source Counts ct stat.error;phot.count;em.X-ray double nullable m2_2_bg M2 Band 2 Background Map Value (ct/pixel) ct/pixel instr.background double nullable classx_prob_extragal_xrb X-Ray Classification Posterior Probability That the Source Is Extragalactic XRB src.class;stat.probability;em.X-ray double nullable pn_det_ml PN Total Band Detection Likelihood stat.likelihood;instr.bandpass double nullable fluxvar Maximum EPIC Inter-Observation Flux Difference in Terms of Sigma sigma stat.stdev;phot.flux;em.X-ray.soft double nullable om_b_extended_flag OM B Band Extent Flag: 1=Extended meta.code;src;phys.angSize;em.opt.B char nullable m1_4_bg M1 Band 4 Background Map Value (ct/pixel) ct/pixel instr.background double nullable m2_5_det_ml M2 Band 5 Detection Likelihood stat.likelihood;instr.bandpass double nullable m1_hr1 M1 Hardness Ratio for Bands 1 and 2 phot.flux;arith.ratio;em.X-ray.soft double nullable om_uvm2_chisq_dof OM UVM2 Band Variability Measure Degrees of Freedom stat.fit.dof;src.var;em.UV.200-300nm double nullable classx_prob_extended X-Ray Classification Posterior Probability That the Source Is Extended src.class;stat.probability;em.X-ray double nullable gaia_match_prob Probability That the Gaia and X-Ray Sources Match stat.probability;src double nullable m2_cts M2 Total Band Source Counts ct phot.count;em.X-ray double nullable info_counterparts Link to Further Information on Counterparts meta.ref;src char nullable ep_offax Distance between Detection Position and On-Axis Position of EPIC (arcmin) arcmin instr.offset double nullable m1_rate_error Uncertainty in M1 Total Band Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable m2_5_rate M2 Band 5 Count Rate (ct/s) ct/s phot.count;em.X-ray.medium double nullable om_v_ab_mag OM V Band Magnitude (AB System) phot.mag;em.opt.V double nullable m2_3_ecf Energy Conversion Factor for MOS2 in the 1.0-2.0 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable spec_info Link to Further Spectral Information meta.ref.url;meta.modelled char nullable m2_pileup Estimate of the Pile-Up Level in EPIC/MOS2 stat.value double nullable pn_1_ecf Energy Conversion Factor for PN in the 0.2-0.5 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable fluxvar_2 Maximum EPIC Inter-Observation Band 2 Flux Difference in Terms of Sigma sigma stat.stdev;phot.flux;em.X-ray.soft double nullable fratio_2 Maximum EPIC Band 2 Inter-Observation Flux Ratio src.var.amplitude;phot.flux;em.X-ray.soft double nullable stack_nh Hydrogen column density from fitting of the 5 band spectrum cm^-2 phys.columnDensity double nullable redshift_tpz_z_best Redshift Determined Using the TPZ Method src.redshift double nullable pn_3_rate_error Uncertainty in PN Band 3 Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable m1_ontime M1 Total Good Exposure Time (After GTI Filtering) of the CCD s time.duration;obs.exposure double nullable om_v_quality_flag OM V Band Quality Flag meta.code.qual;em.opt.V int nullable ep_5_flux EPIC Band 5 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.medium double nullable wise_match_prob Probability That the WISE and X-Ray Sources Match stat.probability;src double nullable m2_hr4 M2 Hardness Ratio for Bands 4 and 5 phot.flux;arith.ratio;em.X-ray.medium double nullable fratio_error 1-Sigma Uncertainty on FRATIO stat.error;src.var.amplitude;phot.flux double nullable classx_prob_bkg_agn X-Ray Classification Posterior Probability that the Source Is a Background AGN src.class;stat.probability;em.X-ray double nullable fluxvar_1 Maximum EPIC Inter-Observation Band 1 Flux Difference in Terms of Sigma sigma stat.stdev;phot.flux;em.X-ray.soft double nullable spec_flux_pl_neg_err Lower 1-Sigma Confidence Limit of EPIC Absorbed Flux erg/cm^2/s stat.error;stat.min;phot.flux;em.X-ray;meta.modelled double nullable om_b_quality_flag OM B Band Quality Flag meta.code.qual;em.opt.B int nullable lii Corrected Galactic Longitude of the Source (degrees) degree pos.galactic.lon double nullable pn_3_ecf Energy Conversion Factor for PN in the 1.0-2.0 keV Band ct.cm^2/erg arith.factor;phot.flux;phys.energy double nullable om_v_chisq OM V Band Variability Measure stat.fit.chi2;src.var;em.opt.V double nullable ep_hr1_error Uncertainty in EPIC Hardness Ratio for Bands 1 and 2 stat.error;phot.flux;arith.ratio;em.X-ray.soft double nullable om_srcid Identification of the OM Source in SUSS v6.2 meta.id;src char nullable m1_5_exposure M1 Band 5 Exposure Map (s) s time.duration;obs.exposure double nullable om_uvm2_ab_mag_error OM UVM2 Band Magnitude Uncertainty (AB System) stat.error;phot.mag;em.UV.200-300nm double nullable ep_3_flux EPIC Band 3 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable m1_1_flux M1 Band 1 Flux (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable pn_1_flux_error Uncertainty in PN Band 1 Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable spec_flux_pl EPIC Absorbed Flux from Absorbed Power Law Full Spectral Fit erg/cm^2/s phot.flux;em.X-ray;meta.modelled double nullable gaiadr3_source_id Gaia DR3 Catalog Source Identifier meta.id;src char nullable pn_hr1_error Uncertainty in PN Hardness Ratio for Bands 1 and 2 stat.error;phot.flux;arith.ratio;em.X-ray.soft double nullable var_prob Probability That EPIC Band 0.2-12.0 keV Flux Variability Is Consistent stat.probability;src.var double nullable m2_hr3_error Uncertainty in M2 Hardness Ratio for Bands 3 and 4 stat.error;phot.flux;arith.ratio;em.X-ray.medium;em.X-ray.soft 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