XMMSlewClean ivo://nasa.heasarc/xmmslewcln NASA/GSFC HEASARC XMM-Newton SOC and the EPIC Consortium 2026-07-17 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains the 'clean' sample of sources from the third catalog of X-ray sources found in slew data taken by the European Space Agency's XMM-Newton Observatory, XMMSL3.1 or XMMSLEW, Version 3.1. It has been created by the XMM-Newton Survey Science Center (SSC) on behalf of ESA, building on previous work carried out by the XMM-Newton SOC. The core <a href="/W3Browse/xmm-newton/xmmslewful.html">XMMSL3</a> catalog contains detections drawn from 3257 XMM-Newton pn slew observations, covering an energy interval from 0.2 keV to 12 keV. These observations were made between 2000 August 26 and 2026 April 26. All slew observations are public. A full discussion of the differences between XMMSL3.1 and XMMSL3 is given in Section 12 of the <a href="http://xmmssc.irap.omp.eu/Catalogue/XMMSL3.1/XMMSL3.1_Catalogue_User_Guide.html">XMMSL3 Users Guide</a>. This database table was first created by the HEASARC in August 2007 based on the FITS version of XMMSL1D1 (v1.1) of the XMM Slew Catalog. The current version was ingested in June 2026 and is based on the FITS version of XMMSL3 (v3.1) of the XMM Slew Catalog obtained from the following URLs: <a href="http://xmmssc.irap.omp.eu/Catalogue/XMMSL3/xmmsl3.1_v1.0.fits">http://xmmssc.irap.omp.eu/Catalogue/XMMSL3/xmmsl3.1_v1.0.fits</a> (the total sample). This catalog contains only the entries from that FITS file which have VAL_FLAG = 'CLEAN SAMPLE'. That file is also available at <a href="https://heasarc.gsfc.nasa.gov/FTP/xmm/data/catalogues/xmmsl3.1_v1.0.fits.gz">https://heasarc.gsfc.nasa.gov/FTP/xmm/data/catalogues/xmmsl3.1_v1.0.fits.gz</a>. <p> The HEASARC has endeavored to retain the same parameter names as in the ESA version, but some names have been changed so as to conform to the standard HEASARC parameter naming conventions, e.g., all error parameter names which ended in "_err" in the ESA version end in "_error" in this HEASARC version. For other parameters which have had their names changed, their original ESA names are listed in square brackets in their descriptions below. <p> The HEASARC removed the alt_name parameter in June 2026 since all of the values in the latest version of the FITS catalog were null (blank). This is a service provided by NASA HEASARC . 2008A&A...480..611S https://heasarc.gsfc.nasa.gov/W3Browse/all/xmmslewcln.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=xmmslewcln& GET text/xml 180 99999 true 333.4588832439 -89.38069038559 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=xmmslewcln GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_xmmslewcln&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 X-ray public xmmslewcln XMM-Newton Slew Survey Clean Source Catalog, v3.1 xmmslew_name Catalog Designation of Source meta.id;meta.main char nullable name Source Designation by Cross-Correlation of Position with Astronomical Catalogs meta.id char nullable ra Right Ascension of the Source degree pos.eq.ra;meta.main double nullable dec Declination of the Source degree pos.eq.dec;meta.main double nullable flux_b8 Source Flux in the Total Energy Band (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray double nullable flux_b8_error Error in the Total-Band Source Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray double nullable count_rate_b8 Total-Band Count Rate (ct/s) ct/s phot.count;em.X-ray double nullable count_rate_b8_error Error in the Total-Band Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray double nullable class Browse Object Classification src.class short 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 bii_b6 Galactic Latitude of the Soft-Band Source degree pos.galactic.lat double nullable subimage_end_time End Time of Subimage in Which Source Detected mjd time.end;obs.image double nullable ext_b8 Spatial Extension of the Source in the Total Energy Band (pixels) pixel phys.angSize double nullable ext_ml_b7 Likelihood of the Source Being Extended in the Hard Band stat.likelihood;phys.angSize;em.X-ray.medium double nullable subimage_time Start Time of Subimage in Which Source Detected mjd time.start;obs.image double nullable radec_b6_error Statistical 1-Sigma Error in Soft-Band Source Position arcsec stat.error;pos;em.X-ray.soft double nullable scts_b8_error Statistical 1-Sigma Error for the Total-Band Source Counts ct stat.error;phot;em.X-ray double nullable ver_halo Flag Indicates Detection within Halo of Very Bright Source, Probably Spurious meta.code.qual char nullable id_resource Astronomical Database or Catalog from Which the Best Match Has Been Selected meta.dataset;meta.table char nullable end_time End Time of Observation mjd time.end;obs double nullable ximname_b6 Name of the Image Containing the Soft-Band Detection meta.id;obs.image char nullable flux_b7 Source Flux in the Hard Energy Band (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.medium double nullable hr1_error Error in Hardness Ratio stat.error;phot.count;arith.ratio;em.X-ray.medium;em.X-ray.soft double nullable ximname_b7 Name of the Image Containing the Hard-Band Detection meta.id;obs.image char nullable ra_b8 J2000 Right Ascension of the Total-Band Source degree pos.eq.ra double nullable ver_hibgnd Flag Indicates Detection within High-Background Region and Is Probably Spurious meta.code.qual char nullable ver_optload Flag Indicates Source May Suffer from Optical Loading meta.code.qual char nullable bg_map_b8 Background Counts Per Pixel for the Total Band ct/pixel instr.background double nullable flux_b6 Source Flux in the Soft Energy Band (erg/cm^2/s) erg/cm^2/s phot.flux;em.X-ray.soft double nullable rass_offset Distance between the Best Match ROSAT Source and Slew Survey Source arcsec pos.angDistance double nullable lii_b6 Galactic Longitude of the Soft-Band Source degree pos.galactic.lon;em.X-ray.soft double nullable scts_b7 Background-Subtracted, PSF-Corrected Counts in the Hard Energy Band (2-12 keV) ct phot;em.X-ray.medium double nullable "time" Start Time of Observation mjd time.start;obs double nullable radec_b8_error Statistical 1-Sigma Error in Total-Band Source Position arcsec stat.error;pos;em.X-ray double nullable exp_map_b8 Effective On-Axis Exposure Time in the Total Energy Band (secs) s time.duration;obs.exposure;em.X-ray double nullable det_ml_b7 Detection Likelihood in the Hard Energy Band (2-12 keV) stat.likelihood;em.X-ray.medium double nullable unfiltered_counts Number of Counts Found within 1 Arcmin with No Filtering ct phot.count;em.X-ray short nullable flag_comment Comment Which Explains Why a Particular Source Flag Has Been Set to True meta.note char nullable x_ima_b7 X Position of the Source in the Hard-Band Image in Image Pixels pixel pos.cartesian.x;instr.pixel double nullable y_ima_b7 Y Position of the Source in the Hard-Band Image in Image Pixels pixel pos.cartesian.y;instr.pixel double nullable image_bg_rate Peak Background Count Rate in the Source Extraction Image (ct/s) ct/s instr.background double nullable rass_name Designation of the Closest ROSAT All-Sky Survey (RASS) Source meta.id char nullable mode_id Observing Mode of the EPIC-pn Camera instr.setup char nullable ext_b7_error Statistical 1-Sigma Error for the Hard-Band Spatial Extension (pixels) pixel stat.error;phys.angSize;em.X-ray.medium double nullable bg_map_b6 Background Counts Per Pixel for the Soft Band ct/pixel instr.background double nullable y_ima_b6 Y Position of the Source in the Soft-Band Image in Image Pixels pixel pos.cartesian.y;instr.pixel double nullable obsid XMM-Newton Observation Identifier meta.id;obs char nullable ext_b7 Spatial Extension of the Source in the Hard Energy Band (pixels) pixel phys.angSize;em.X-ray.medium double nullable hr1 Hardness Ratio phot.count;arith.ratio;em.X-ray.medium;em.X-ray.soft double nullable ext_b8_error Statistical 1-Sigma Error for the Total-Band Spatial Extension (pixels) pixel stat.error;phys.angSize double nullable ext_ml_b8 Likelihood of the Source Being Extended in the Total Band stat.likelihood;phys.angSize;em.X-ray double nullable flux_b6_error Error in the Soft-Band Source Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.soft double nullable x_ima_b8 X Position of the Source in the Total-Band Image in Image Pixels pixel pos.cartesian.x;instr.pixel double nullable ximname_b8 Name of the Image Containing the Total-Band Detection meta.id;obs.image char nullable ver_false Flag Indicates Problems Not Included in the Other Flags, e.g. Zero Exposure meta.code.qual char nullable count_rate_b6_error Error in the Soft-Band Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable y_ima_b8 Y Position of the Source in the Total-Band Image in Image Pixels pixel pos.cartesian.y;instr.pixel double nullable ver_nredg Flag Indicates Detection in Consecutive Images, Likely Inaccurate Position meta.code.qual;pos char nullable lii Galactic Longitude of the Source degree pos.galactic.lon double nullable bii_b8 Galactic Latitude of the Total-Band Source degree pos.galactic.lat double nullable ra_b7 J2000 Right Ascension of the Hard-Band Source degree pos.eq.ra;em.X-ray.medium double nullable ra_b6 J2000 Right Ascension of the Soft-Band Source degree pos.eq.ra;em.X-ray.soft double nullable dec_b6 J2000 Declination of the Soft-Band Source degree pos.eq.dec double nullable srcname_b6 Source Designation Defined in the Soft-Band List meta.id char nullable scts_b7_error Statistical 1-Sigma Error for the Hard-Band Source Counts ct stat.error;phot;em.X-ray.medium double nullable count_rate_b7 Hard-Band Count Rate (ct/s) ct/s phot.count;em.X-ray.medium double nullable srcname_b8 Source Designation Defined in the Total-Band List meta.id char nullable ext_b6_error Statistical 1-Sigma Error for the Soft-Band Spatial Extension (pixels) pixel stat.error;phys.angSize;em.X-ray.soft double nullable det_ml_b6 Detection Likelihood in the Soft Energy Band (0.2-2 keV) stat.likelihood;em.X-ray.soft double nullable sourcenum Number Which Uniquely Identifies Each Detection in an Observation meta.id short nullable scts_b8 Background-Subtracted, PSF-Corrected Counts for Total Energy Band (0.2-12 keV) ct phot;em.X-ray double nullable lii_b7 Galactic Longitude of the Hard-Band Source degree pos.galactic.lon;em.X-ray.medium double nullable ver_inext Flag Indicates Detection within Extended Source and Is Probably Spurious meta.code.qual char nullable bii Galactic Latitude of the Source degree pos.galactic.lat double nullable filtered_counts Number of Counts Found within 1 Arcmin After Filtering ct phot.count;em.X-ray short nullable radec_error Statistical 1-Sigma Error in Source Position arcsec stat.error;pos double nullable exp_map_b7 Effective On-Axis Exposure Time in the Hard Energy Band (secs) s time.duration;obs.exposure;em.X-ray.medium double nullable extras_source_number Number of Corresponding Source in EXTRaS LTV Catalog meta.id.cross int nullable val_flag Flag Indicates Source Included in Clean Sample meta.code.qual char nullable srcname_b7 Source Designation Defined in the Hard-Band List meta.id char nullable det_ml_b8 Detection Likelihood in the Total Energy Band (0.2-12 keV) stat.likelihood;em.X-ray double nullable scts_b6_error Statistical 1-Sigma Error for the Soft-Band Source Counts ct stat.error;phot;em.X-ray.soft double nullable xmmsl1_name Designation of Source in XMMSL1, If Existing meta.id.cross char nullable count_rate_b7_error Error in the Hard-Band Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray.medium double nullable bii_b7 Galactic Latitude of the Hard-Band Source degree pos.galactic.lat double nullable lii_b8 Galactic Longitude of the Total-Band Source degree pos.galactic.lon;em.X-ray double nullable x_ima_b6 X Position of the Source in the Soft-Band Image in Image Pixels pixel pos.cartesian.x;instr.pixel double nullable scts_b6 Background-Subtracted, PSF-Corrected Counts in the Soft Energy Band (0.2-2 keV) ct phot;em.X-ray.soft double nullable dec_b7 J2000 Declination of the Hard-Band Source degree pos.eq.dec double nullable radec_b7_error Statistical 1-Sigma Error in Hard-Band Source Position arcsec stat.error;pos;em.X-ray.medium double nullable exp_map_b6 Effective On-Axis Exposure Time in the Soft Energy Band (secs) s time.duration;obs.exposure;em.X-ray.soft double nullable id_offset Distance between the Best Match Candidate and Slew Survey Source arcsec pos.angDistance double nullable ext_b6 Spatial Extension of the Source in the Soft Energy Band (pixels) pixel phys.angSize;em.X-ray.soft double nullable flux_b7_error Error in the Hard-Band Source Flux (erg/cm^2/s) erg/cm^2/s stat.error;phot.flux;em.X-ray.medium double nullable bg_map_b7 Background Counts Per Pixel for the Hard Band ct/pixel instr.background double nullable dec_b8 J2000 Declination of the Total-Band Source degree pos.eq.dec double nullable ver_psusp Flag Indicates Source Position Likely Inaccurate, Poor Attitude Reconstruction meta.code.qual;pos char nullable ext_ml_b6 Likelihood of the Source Being Extended in the Soft Band stat.likelihood;phys.angSize;em.X-ray.soft double nullable id_category Source Type as Determined by Cross-Correlation Process src.class char nullable count_rate_b6 Soft-Band Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable