XMMLSS10KS ivo://nasa.heasarc/xmmlss10ks NASA/GSFC HEASARC Chiappetti et al. 2026-07-17 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains some of the X-ray results from the final release of the multiwavelength XMM-Large Scale Structure (LSS) data set, covering the full survey area of 11.1 deg<sup>2</sup>. The 124 XMM-Newton observations used in the complete XMM-LSS are described in Section 2 and Table 1 of the primary reference paper (Chiappetti et al. 2013, hereafter Paper II). The X-ray data were processed with the latest XMM-LSS XAMIN pipeline version. The catalogs in Paper II supersede the catalog from the first paper in this series (Paper I: Pierre et al. 2007, MNRAS, 382, 279, available at the HEASARC as the XMMLSS table) pertaining to the initial 5 deg<sup>2</sup>. The authors provide X-ray source lists in the customary soft and hard energy bands (0.5-2 keV and 2-10 keV, respectively) for a total of 5572 objects in the catalog limited to 10 ks exposures presented in this table, and a total of 6721 objects in the deep full-exposure 2XLSSd catalog (available at the HEASARC as the XMMLSSDEEP table), above a detection likelihood of 15 in at least one band. At the XMMLSS web site which they maintain (<a href="http://cosmosdb.iasf-milano.inaf.it/XMM-LSS/">http://cosmosdb.iasf-milano.inaf.it/XMM-LSS/</a>), the authors also provide a multiwavelength catalog, cross-correlating their list of X-ray sources with infrared, near-infrared, optical and ultraviolet catalogs. Customary data products, such as X-ray FITS images and thumbnail images from the Canada-France-Hawaii Telescope Legacy Survey and the Spitzer Wide-Area Infrared Extragalactic Survey, are made available there, together with their data base in Milan, which can be queried interactively. In this table, the authors provide the source list for the full area (11.1 square degrees) of the XMM-LSS, with a total of 5572 point-like or extended sources above a detection likelihood of 15 in either the 0.5-2 or 2-10 keV bands. This table, the "standard" 2XLSS catalog containing the results of the analysis of the survey area using uniform 10-ksec exposures for all pointings longer than 10 ksec, lists the main X-ray parameters, while further multiwavelength parameters and data products (X-ray images and optical/IR thumbnails) are available at the Milan XMM-LSS database site referenced above. It supersedes the first XMM-LSS version (Pierre et al. 2007, available at the HEASARC as the XMMLSS table). Analogously to Paper I, only sources with an off-axis angle < 13 arcmin were processed by the authors' X-ray data processing pipeline software, XAMIN. The catalog includes all the extended sources classified in the customary C1 and C2 classes (see Section 3.6 of Paper II) plus all point-like sources with a point source detection likelihood (DET_LH) greater than 15 (so-called non-spurious sources). This table was created by the HEASARC in February 2013 based on the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/MNRAS/429/1652">CDS catalog J/MNRAS/429/1652</a> file 2xlss.dat. This is a service provided by NASA HEASARC . 2013MNRAS.429.1652C https://heasarc.gsfc.nasa.gov/W3Browse/all/xmmlss10ks.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=xmmlss10ks& GET text/xml 180 99999 true 34.17741 -6.36673 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=xmmlss10ks GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_xmmlss10ks&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 X-ray public xmmlss10ks XMM-Newton Large-Scale Structure Uniform 10-ksec Exposure X-Ray source_number Sequential Identification Number for Each Source in Catalog meta.id;src int nullable name Catalog Source Designation meta.id;meta.main char nullable ra Right Ascension degree pos.eq.ra;meta.main double nullable dec Declination degree pos.eq.dec;meta.main double nullable pn_sb_rate 0.5-2keV pn Count Rate ct/s phot.count;em.X-ray.soft double nullable pn_hb_rate 2-10keV pn Count Rate ct/s phot.count;em.X-ray.medium double nullable sb_flux Flux in 0.5-2keV Band erg/s/cm^2 phot.flux;em.X-ray.soft double nullable hb_flux Flux in 2-10keV Band 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 sb_source_number Identifier in 0.5-2keV Band meta.id int nullable sb_dec Declination in 0.5-2keV Band degree pos.eq.dec double nullable mos_hb_rate 2-10keV MOS Count Rate ct/s phot.count;em.X-ray.medium double nullable hb_extent_likelihood Extension Likelihood stat.likelihood double nullable bii Galactic Latitude degree pos.galactic.lat double nullable hb_name Alternative Designation in 2-10keV Band meta.id char nullable sb_flux_flag Flag [0-2] Indicates Flux Difference in 0.5-2keV Band meta.code;phot.flux;em.X-ray.soft short nullable lii Galactic Longitude degree pos.galactic.lon double nullable hb_source_number Identifier in 2-10keV Band meta.id int nullable hb_dec Declination 2-10keV Band degree pos.eq.dec double nullable mos_sb_rate 0.5-2keV MOS Count Rate ct/s/detector phot.count;em.X-ray.soft double nullable sb_name Alternative Designation in 0.5-2keV Band (2XLSSB JHHMMSS.s+DDMMSS) meta.id char nullable sb_ra Right Ascension in 0.5-2keV Band degree pos.eq.ra double nullable old_source_number Pointer to Version I XLSS Catalog meta.id.assoc int nullable sb_off_axis Off-Axis Angle arcmin instr.offset double nullable sb_error_radius Position Error in 0.5-2keV Band arcsec stat.error;pos double nullable sb_core_radius Core Radius for extended sources arcsec phys.angSize;src double nullable hb_detect_likelihood Detection Likelihood stat.likelihood double nullable sb_extent_likelihood Extension Likelihood stat.likelihood double nullable hb_ra Right Ascension in 2-10keV Band degree pos.eq.ra double nullable deep_source_number Pointer to Deep 2XLSSd Catalog meta.id.assoc int nullable hb_error_radius Position Error in 2-10keV Band arcsec stat.error;pos double nullable sb_detect_likelihood Detection Likelihood stat.likelihood double nullable hb_off_axis Off-Axis Angle arcmin instr.offset double nullable hb_flux_flag Flag [0-2] Indicates Flux Difference in 2-10keV Band meta.code;phot.flux;em.X-ray.medium short nullable extended_source_class Flag [0-2] Indicates Extended Source Class meta.code.class short nullable hb_core_radius Core Radius for Extended Sources arcsec phys.angSize;src double nullable