LOCKMANXM2 ivo://nasa.heasarc/lockmanxm2 NASA/GSFC HEASARC Brunner et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source The Lockman Hole represents the sky area of lowest Galactic line-of-sight columns density. It was observed by the XMM-Newton X-ray observatory in 18 pointings performed between April 2000 and December 2002. The total exposure time spent on the field was 1.16 Ms (EPIC pn detector; EPIC MOS detector: 1.30 Ms). The effective exposure after removal of times of high particle background is 637 ks (EPIC pn detector; EPIC MOS detector: 765 ks). The catalog lists positions, count rates, fluxes, hardness ratios, and partial optical classifications of 409 X-ray point sources detected in the central 0.196 square degrees of the field down to a detection likelihood threshold in the full energy band of 10 (3.9 sigma), up to 4 of which may be spurious according to the authors' Monte Carlo simulations. The analysis was performed using the XMM-Newton SAS data analysis package version 6.0. This table was created by the HEASARC in May 2008 based on the <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/A+A/479/283">CDS Catalog J/A+A/479/283</a> file table3.dat. This is a service provided by NASA HEASARC . 2008A&A...479..283B https://heasarc.gsfc.nasa.gov/W3Browse/all/lockmanxm2.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=lockmanxm2& GET text/xml 180 99999 true 163.25683333 57.25 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=lockmanxm2 GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_lockmanxm2&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 X-ray public lockmanxm2 Lockman Hole XMM-Newton X-Ray Point Source Catalog name Catalog Source Designation ([BCH2008] nnnn) 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 error_radius Positional error (arcsec) arcsec stat.error;pos double nullable count_rate Source Count Rate in 0.5-10.0keV Band (ct/s) ct/s phot.count;em.X-ray double nullable count_rate_error Source Count Rate Error in 0.5-10.0keV Band (ct/s) ct/s stat.error;phot.count;em.X-ray double nullable flux Flux in 0.5-10.0keV Band (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray double nullable flux_error Flux Error in 0.5-10.0keV Band (erg/s/cm^2) erg/s/cm^2 stat.error;phot.flux;em.X-ray double nullable mb_count_rate Source Count Rate in 2.0-4.5keV Band (ct/s) ct/s phot.count;em.X-ray.medium double nullable hardness_ratio_2 Hardness Ratio (CR3-CR2)/(CR3+CR2) phot.flux;arith.ratio;em.X-ray double nullable lii Galactic Longitude degree pos.galactic.lon double nullable hardness_ratio_1 Hardness Ratio (CR2-CR1)/(CR2+CR1) phot.flux;arith.ratio;em.X-ray double nullable mb_count_rate_error Source Count Rate Error in 2.0-4.5keV Band (ct/s) ct/s stat.error;phot.count;em.X-ray.medium double nullable hb_flux_error Flux Error in 2.0-10.0keV Band (erg/s/cm^2) erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable uhb_flux_error Flux Error in 5.0-10.0keV Band (erg/s/cm^2) erg/s/cm^2 stat.error;phot.flux;em.X-ray.medium double nullable mb_detect_likelihood Likelihood of Detection in 2.0-4.5keV Band stat.likelihood int nullable rosat_source_number ROSAT Source Identification Number (Lehmann et al., 2001, Cat. J/A+A/371/833) meta.id short nullable detect_likelihood Likelihood of Detection in 0.5-10.0keV Band stat.likelihood int nullable hardness_ratio_2_error Hardness Ratio Error stat.error;phot.flux;arith.ratio;em.X-ray double nullable sb_flux Flux in 0.5-2.0keV Band (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray.soft double nullable hardness_ratio_1_error Hardness Ratio Error stat.error;phot.flux;arith.ratio;em.X-ray double nullable uhb_detect_likelihood Likelihood of Detection in 4.5-10.0keV Band stat.likelihood int nullable source_number Sequential Identification Number for Each X-Ray Source in Catalog meta.id;src short nullable sb_flux_error Flux Error in 0.5-2.0keV Band (erg/s/cm^2) erg/s/cm^2 stat.error;phot.flux;em.X-ray.soft double nullable uhb_count_rate Source Count Rate in 4.5-10.0keV Band (ct/s) ct/s phot.count;em.X-ray.medium double nullable class Browse Object Classification src.class short nullable rosat_class Object Class of ROSAT Object (Lehmann et al., 2001, J/A+A/371/833, Fig. 7) src.class char nullable hardness_ratio_3_error Hardness Ratio Error stat.error;phot.flux;arith.ratio;em.X-ray double nullable sb_detect_likelihood Likelihood of Detection in 0.5-2.0keV Band stat.likelihood int nullable hb_flux Flux in 2.0-10.0keV Band (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray.medium double nullable sb_count_rate Source Count Rate in 0.5-2.0keV Band (ct/s) ct/s phot.count;em.X-ray.soft double nullable uhb_flux Flux in 5.0-10.0keV Band (erg/s/cm^2) erg/s/cm^2 phot.flux;em.X-ray.medium double nullable xmm_class Object Class from XMM Follow-up (Szokoly et al., in preparation, Fig. 7) src.class char nullable bii Galactic Latitude degree pos.galactic.lat double nullable hardness_ratio_3 Hardness Ratio (CR3-CR1)/(CR3+CR1) phot.flux;arith.ratio;em.X-ray double nullable sb_count_rate_error Source Count Rate Error in 0.5-2.0keV Band (ct/s) ct/s stat.error;phot.count;em.X-ray.soft double nullable uhb_count_rate_error Source Count Rate Error in 4.5-10.0keV Band (ct/s) ct/s stat.error;phot.count;em.X-ray.medium double nullable alt_name XMMU Source Designation (XMMU JHHMMSS.s+DDMMSS) meta.id char 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