XMM-Newton Galactic Plane Survey

XMM-Newton Galactic Plane Survey - XGPS XMM/GPS ivo://nasa.heasarc/xmmgps NASA/GSFC HEASARC Hands, Warwick, Watson, Helfand 2026-07-17 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source This table contains the first results from the XMM-Newton Galactic Plane Survey (XGPS). In the first phase of the program, 22 pointings were used to cover a region of approximately 3 square degrees between 19 and 22 degrees in Galactic Longitude and +/-0.6 degrees in Galactic Latitude. In total, over 400 point X-ray sources have been resolved at >=5-sigma significance, down to a flux limit of ~2 x 10-14 erg/s/cm2 (2-10 keV). The sources exhibit a very wide range of spectral hardness, with interstellar absorption identified as a major influence. The source populations detected in the soft (0.4 - 2 keV) band and hard (2 - 6 keV) band show surprisingly little overlap. The majority of the soft sources appear to be associated with relatively nearby stars with active stelaar coronae, judging from their high coincidence with bright stellar counterparts. The combination of the XGPS measurements in the hard X-ray band with the results from earlier surveys carried out by ASCA and Chandra reveals the form of the low-latitude X-ray source counts over 4 decades of flux. It appears that extragalactic sources dominate below ~10-13 erg/s/cm2 (2-10 keV), with a predominantly Galactic source population present above this flux threshold. The nature of the faint Galactic population observed by XMM-Newton remains uncertain, although cataclysmic variables and RS CVn systems may contribute substantially. This table was created by the HEASARC in February 2005 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/MNRAS/351/31/tablea1">CDS Catalog J/MNRAS/351/31/tablea1</a>.dat. This is a service provided by NASA HEASARC . 2004MNRAS.351...31H https://heasarc.gsfc.nasa.gov/W3Browse/all/xmmgps.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=xmmgps& GET text/xml 180 99999 true 276.562625 -12.40830556 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=xmmgps GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_xmmgps&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 X-ray public xmmgps XMM-Newton Galactic Plane Survey - XGPS name X-Ray 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 mos_count_rate MOS Broad-Band Count Rate (ct/s) ct/s phot.count;em.X-ray double nullable mos_count_rate_error RMS Uncertainty on MOS Broad-Band Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray double nullable pn_count_rate PN Broad-Band Count Rate (ct/s) ct/s phot.count;em.X-ray double nullable pn_count_rate_error RMS Uncertainty on PN Broad-Band Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray double nullable rmag R Magnitude from UK Schmidt Survey mag phot.mag;em.opt.R float nullable pn_quality_flag PN Quality Flag meta.code.qual float nullable mos_hard_rate_error RMS Uncertainty on MOS Hard-Band Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray double nullable lii Galactic Longitude degree pos.galactic.lon double nullable alt_name_1 Optical Identification 1 meta.id char nullable mos_hard_rate MOS Hard-Band Count Rate (ct/s) ct/s phot.count;em.X-ray double nullable mos_soft_rate_error RMS Uncertainty on MOS Soft-Band Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray double nullable alt_name_2 Optical Identification 2 meta.id char nullable survey_field XGPS-I Survey Field in Which the Source Was Detected meta.id;obs.field char nullable mos_soft_rate MOS Soft-Band Count Rate (ct/s) ct/s phot.count;em.X-ray double nullable alt_name_3 Optical Identification 3 meta.id char nullable bii Galactic Latitude degree pos.galactic.lat double nullable pn_soft_rate PN Soft-Band Count Rate (ct/s) ct/s phot.count;em.X-ray double nullable pn_hard_rate_error RMS Uncertainty on PN Hard-Band Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray double nullable pn_soft_rate_error RMS Uncertainty on PN Soft-Band Count Rate (ct/s) ct/s stat.error;phot.count;em.X-ray double nullable pn_hard_rate PN Hard-Band Count Rate (ct/s) ct/s phot.count;em.X-ray double nullable mos_quality_flag MOS Quality Flag meta.code.qual float nullable hardness_ratio X-Ray Hardness Ratio phot.count;arith.ratio;em.X-ray float 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