XMMLSS ivo://nasa.heasarc/xmmlss NASA/GSFC HEASARC Pierre et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The XMM-Newton Large-Scale Structure (XMM-LSS) X-Ray Source Catalog contains the source list for the first 5.5 surveyed square degrees of the XMM-LSS, with a total of 3385 point-like or extended sources above a detection likelihood of 15 in either 0.5 - 2 keV or 2 - 10 keV bands. The agreement with deep log N- log S is excellent. The main parameters considered are position, count rate, source extent with associated likelihood values. A set of additional quantities such as astrometric corrections and fluxes are further calculated while errors on the position and count rate are deduced from simulations. This table contains the main parameters, while further parameters and data products (X-ray images and optical thumbnails) are available at the Milan XMM-LSS database site: <a href="http://cosmos.iasf-milano.inaf.it/~lssadmin/Website/LSS/Query">http://cosmos.iasf-milano.inaf.it/~lssadmin/Website/LSS/Query</a> This table was created by the HEASARC in February 2008 based on the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/MNRAS/382/279">CDS Catalog J/MNRAS/382/279</a> file xlss.dat. This is a service provided by NASA HEASARC . 2007MNRAS.382..279P https://heasarc.gsfc.nasa.gov/W3Browse/all/xmmlss.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=xmmlss& GET text/xml 180 99999 true 35.15416667 -5.70313889 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=xmmlss GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_xmmlss&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 X-ray public xmmlss XMM-Newton Large-Scale Structure X-Ray Source Catalog name Catalog Source Designation (XLSS JHHMMSS.s+DDMMSSa) meta.id;meta.main char nullable alt_name Alternative Source Designation (XLSS nnnnn) meta.id char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable pn_sb_rate 0.5-2keV PN Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable pn_hb_rate 2-10keV PN Count Rate (ct/s) ct/s phot.count;em.X-ray.medium double nullable sb_flux 0.5-2keV Flux in 0.5-2keV Band (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray.soft double nullable hb_flux 2-10keV Flux in 2-10keV Band (erg/s/cm^2) erg/s/cm^2 phot.flux;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 hb_ra_j2000 2-10keV Source Right Ascension (J2000) pos.eq.ra char nullable hb_dec_j2000 2-10keV Source Declination (J2000) pos.eq.dec char nullable sb_off_axis 0.5-2keV Off-Axis Angle (arcmin) arcmin instr.offset double nullable sb_name Alternative Designation for Source in 0.5-2keV Band (XLSSB JHHMMSS.s+DDMMSS) meta.id char nullable hb_extent_likelihood 2-10keV Extension Likelihood stat.likelihood double nullable hb_source_number Identification Number for Source in 2-10keV Band meta.id short nullable sb_ra_j2000 0.5-2keV Source Right Ascension (J2000) pos.eq.ra char nullable sb_dec_j2000 0.5-2keV Source Declination (J2000) pos.eq.dec char nullable sb_error_radius Position Error in 0.5-2keV Band (arcsec) arcsec stat.error;pos double nullable sb_flux_flag Flag [0-2] Indicates 0.5-2keV Flux Difference meta.code;phot.flux;em.X-ray.soft short nullable sb_extent_likelihood 0.5-2keV Extension Likelihood stat.likelihood double nullable hb_detect_likelihood 2-10keV Detection Likelihood stat.likelihood double nullable sb_core_radius 0.5-2keV Core Radius for Extended Sources (arcsec) arcsec phys.angSize;src double nullable extended_source_class Flag [0-2] Indicates 0.5-2keV Extended Source Class meta.code.class short nullable mos_sb_rate 0.5-2keV MOS Count Rate (ct/s) ct/s phot.count;em.X-ray.soft double nullable hb_off_axis 2-10keV Off-Axis Angle (arcmin) arcmin instr.offset double nullable sb_source_number Identification Number for Source in 0.5-2keV Band meta.id short nullable source_number Sequential Identification Number for Each X-Ray Source in Catalog meta.id;src int nullable lii Galactic Longitude degree pos.galactic.lon double nullable hb_name Alternative Designation for Source in 2-10keV Band (XLSSCD JHHMMSS.s+DDMMSS) meta.id char nullable hb_core_radius 2-10keV Core Radius for Extended Sources (arcsec) arcsec phys.angSize;src double nullable hb_flux_flag Flag [0-2] Indicates 2-10keV Flux Difference meta.code;phot.flux;em.X-ray.medium short nullable mos_hb_rate 2-10keV MOS Count Rate (ct/s) ct/s phot.count;em.X-ray.medium double nullable hb_error_radius Position Error in 2-10keV Band (arcsec) arcsec stat.error;pos double nullable bii Galactic Latitude degree pos.galactic.lat double nullable sb_detect_likelihood 0.5-2keV Detection Likelihood stat.likelihood double nullable