XMMBSS ivo://nasa.heasarc/xmmbss NASA/GSFC HEASARC Della Ceca et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source We present here the XMM-Newton Bright Serendipitous Survey, composed of two flux-limited samples: the XMM-Newton Bright Source Sample (BSS, hereafter) and the XMM-Newton "Hard" Bright Source Sample (HBSS, hereafter). The selection criteria for these two sample, 0.5 - 4.5 keV count rate >= 0.01 ct/s (BSS) and 4.5 - 7.5 keV count rate >= 0.002 ct/s (HBSS), correspond to a flux limit of f<sub>X</sub> ~ 7 x 10<sup>-14</sup> erg/cm<sup>2</sup>/s in the 0.5 - 4.5 keV and 4.5 - 7.5 keV energy bands, respectively, for sources with power-law spectra with energy spectral indices between 0.7 and 0.8. This table contains the basic data on a complete sample of 400 X-ray sources (389 of them belong to the BSS, 67 to the HBSS, with 56 X-ray sources in common) derived from the analysis of 237 suitable XMM-Newton fields (211 for the HBSS). At the flux limit of the survey, it covers a survey area of 28.10 (25.17 for the HBSS) square degrees. The extragalactic number-flux relationships (in the 0.5 - 4.5 keV and in the 4.5 - 7.5 keV energy bands) are in good agreement with previous and new results making the authors confident in the correctness of the data selection and their analysis. This table was created by the HEASARC in October 2006 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/A+A/428/383">CDS Catalog J/A+A/428/383</a> (the merger of files table3.dat and table4.dat). This is a service provided by NASA HEASARC . 2004A&A...428..383D https://heasarc.gsfc.nasa.gov/W3Browse/all/xmmbss.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=xmmbss& GET text/xml 180 99999 true 68.70166667 -77.89144444 0.0166666666666667 https://heasarc.gsfc.nasa.gov/xamin/vo/tap https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/getvotable.pl?name=xmmbss GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_xmmbss&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 X-ray public xmmbss XMM-Newton Bright Serendipitous Survey name 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 sb_count_rate Source Count Rate, in the 0.5-4.5keV Energy Band (ct/s) ct/s double nullable sb_count_rate_error Uncertainty in the 0.5-4.5keV Count Rate ct/s double nullable hb_count_rate Source Count Rate, in the 4.5-7.5keV Energy Band (ct/s) ct/s double nullable hb_count_rate_error Uncertainty in the 4.5-7.5keV Count Rate ct/s double nullable optical_class Optical Spectroscopic Classification char nullable obsid XMM-Newton Observation Identifier of the Sample meta.id;obs char nullable hr_2 Hardness Ratio 2, [C(2-4.5kev)-C(0.5-2keV)]/[C(2-4.5kev)+C(0.5-2keV)] double nullable hr_3_pos_err Upper Uncertainty on HR_3 double nullable lii Galactic Longitude degree pos.galactic.lon double nullable off_axis Angular Distance between the Source and the MOS2 Image Center (arcmin) arcmin instr.offset double nullable hr_2_neg_err Lower Uncertainty on HR_2 double nullable hr_3 Hardness Ratio 3, [C(4.5-7.5kev)-C(2-4.5keV)/[C(4.5-7.5kev)+C(2-4.5keV)] double nullable class Browse Object Classification src.class short nullable hr_2_pos_err Upper Uncertainty on HR_2 double nullable sample Field Indicates Originating Sample for Entry char nullable bii Galactic Latitude degree pos.galactic.lat double nullable source_flag Flags Indicates Notes Concerning Source char nullable hr_3_neg_err Lower Uncertainty on HR_3 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