XMMBSSAGN ivo://nasa.heasarc/xmmbssagn NASA/GSFC HEASARC Corral et al. 2026-10-09 NASA/GSFC HEASARC help desk heasarc-vo at athena.gsfc.nasa.gov Survey Source X-ray surveys are a key instrument in the study of active galactic nuclei (AGN). Thanks to their penetrating ability, X-rays are able to map the innermost regions close to the central super massive black hole (SMBH) as well as to detect and characterize its emission up to high redshift. This table contains results from a detailed X-ray spectral analysis of the AGN belonging to the XMM-Newton Bright Serendipitous Survey (XBS, the HEASARC Browse XMMBSS table, <a href="https://cdsarc.cds.unistra.fr/ftp/cats/IX/41">CDS Cat. IX/41</a>). The XBS is composed of two flux-limited samples selected in the complementary 0.5 to 4.5 and 4.5 to 7.5 keV energy bands and comprising more than 300 AGN up to redshift ~2.4. The authors have performed an X-ray analysis following two different approaches: by analyzing individually each AGN X-ray spectrum and by constructing average spectra for different AGN types. From the individual analysis, the authors find that there seems to be an anticorrelation between the spectral index and the sources' hard X-ray luminosity, such that the average photon index for the higher luminosity sources (>10<sup>44</sup> erg s<sup>-1</sup>) is significantly (>2 sigma) flatter than the average for the lower luminosity sources. They also find that the intrinsic column density distribution agrees with AGN unified schemes, although a number of exceptions are found (3% of the whole sample), which are much more common among optically classified type 2 AGN. The authors also find that the so-called "soft-excess", apart from the intrinsic absorption, constitutes the principal deviation from a power-law shape in AGN X-ray spectra and it clearly displays different characteristics, and likely a different origin, for unabsorbed and absorbed AGN. Regarding the shape of the average spectra, they find that it is best reproduced by a combination of an unabsorbed (absorbed) power law, a narrow Fe K-alpha emission line and a small (large) amount of reflection for unabsorbed (absorbed) sources. This table was created by the HEASARC in November 2011 based on <a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/A+A/530/A42">CDS Catalog J/A+A/530/A42</a> files table2.dat and table3.dat. This is a service provided by NASA HEASARC . 2011A&A...530A..42C https://heasarc.gsfc.nasa.gov/W3Browse/all/xmmbssagn.html Catalog Research served-by HEASARC TAP https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=xmmbssagn& 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=xmmbssagn GET text/xml https://heasarc.gsfc.nasa.gov/cgi-bin/W3Browse/w3query.pl?tablehead=name=heasarc_xmmbssagn&Action=More+Options&Action=Parameter+Search&ConeAdd=1 XMM-NEWTON 0.0166666666666667 X-ray public xmmbssagn XMM-Newton Bright Serendipitous Survey: AGN X-Ray Spectral Prope name Source Designation (XBS JHHMMSS.s+DDMMSS) 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 epic_counts Total EPIC Counts (pn+MOS1+MOS2) ct phot;em.X-ray int nullable redshift Redshift src.redshift double nullable agn_class Source Classification (AGN1, AGN2, or BL Lac) src.class char nullable photon_index Photon Index (Gamma) spect.index double nullable nh_int_limit Limit Flag for Intrinsic Column Density meta.code;phys.columnDensity char nullable nh_int Intrinsic Column Density cm^-2 phys.columnDensity double nullable log_lx Intrinsic Luminosity in the 2-10keV Band log(erg/s) phys.luminosity;em.X-ray.medium double nullable sample BSS Sample to Which the Source Belongs meta.code 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 fit_dof Degrees of Freedom of the Fit stat.fit.dof short nullable null_hypothesis_prob Null Hypothesis Probability percent stat.probability double nullable best_fit_remark Remark Indicates Whether the Simple Power Law Is Considered the Best-Fit or Not meta.code;stat.fit char nullable m2_exposure MOS2 Resulting Exposure Time After Removing High-Background Intervals s time.duration;obs.exposure double nullable photon_index_flag Flag [f] Indicates Fixed Value for the Photon Index meta.code;spect.index char nullable bii Galactic Latitude degree pos.galactic.lat double nullable agn_class_flag Flag [be] Indicates Classification Note meta.code;src.class char nullable pn_exposure pn Resulting Exposure Time After Removing High-Background Intervals s time.duration;obs.exposure double nullable class Browse Object Classification src.class short nullable pn_filter Filter in Use During the Observation for pn Camera instr;instr.filter char nullable m1_exposure MOS1 Resulting Exposure Time After Removing High-Background Intervals s time.duration;obs.exposure double nullable flux Observed Flux in the 2-10keV Band, De-absorbed by Our Galaxy erg/s/cm^2 phot.flux;em.X-ray.medium double nullable fit_flag Flag [p] Indicates Low-Confidence Fit meta.code.qual;stat.fit char nullable nh_gal Galactic Column Density Toward the XMM-Newton Pointing cm^-2 phys.columnDensity double nullable lii Galactic Longitude degree pos.galactic.lon double nullable chi_squared Chi Squared Value of the Fit stat.fit.chi2 double nullable m1_filter Filter in use during the Observation for MOS1 Camera instr;instr.filter char nullable obsid Observation Identifier meta.id;obs char nullable m2_filter Filter in Use During the Observation for MOS2 Camera instr;instr.filter char nullable