Sloan Digital Sky Survey (DR5)/XMM-Newton Quasar Survey Catalog

This table contains the 5th Data Release Sloan Digital Sky Survey (DR5 SDSS)/XMM-Newton Quasar Survey Catalog. This catalog contains 792 SDSS DR5 quasars with optical spectra that have been observed serendipitously in the X-rays with XMM-Newton. These quasars cover a redshift range of z = 0.11 - 5.41 and a magnitude range of i = 15.3 - 20.7. Substantial numbers of radio-loud (70) and broad absorption line (51) quasars exist within this sample. Significant X-ray detections at >=2 sigma account for 87% of the sample (685 quasars), and 473 quasars are detected at >=6 sigma, sufficient to allow X-ray spectral fits. For detected sources, ~60% have X-ray fluxes between F(2-10 keV) = (1-10) x 10^-14 erg cm^-2 s^-1. The authors fit a single power law, a fixed power law with intrinsic absorption left free to vary, and an absorbed power-law model to all quasars with X-ray signal-to-noise ratio >= 6, resulting in a weighted mean photon index Gamma = 1.91 +/- 0.08, with an intrinsic dispersion sigma(Gamma) = 0.38. For the 55 sources (11.6%) that prefer intrinsic absorption, the authors find a weighted mean N_H = 1.5 +/- 0.3 x 10²¹ cm^-2. They find that Gamma correlates significantly with optical color, Delta(g-i), the optical-to-X-ray spectral index (alpha_ox), and the X-ray luminosity. While the first two correlations can be explained as artifacts of undetected intrinsic absorption, the correlation between Gamma and X-ray luminosity appears to be a real physical correlation, indicating a pivot in the X-ray slope. This table was created by the HEASARC in July 2009 based on electronic versions of Tables 1 and 2 from the paper which were obtained from the Astrophysical Journal web site. This is a service provided by NASA HEASARC .

                                            [
  "026:00"
]
                                        

                                            {
  "fn": "Tess Jaffe",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:tess.jaffe@nasa.gov"
}
                                        

                                            [
  {
    "@type": "dcat:Distribution",
    "title": "Data Information (HTML)",
    "format": "HTML",
    "mediaType": "text/html",
    "downloadURL": "https://heasarc.gsfc.nasa.gov/W3Browse/all/sdssxmmqso.html"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Data Information (Unknown Format)",
    "format": "BIN",
    "mediaType": "application/octet-stream",
    "downloadURL": "https://heasarc.gsfc.nasa.gov/xamin/vo/cone?showoffsets&table=sdssxmmqso&"
  }
]
                                        

                                            [
  "na"
]
                                        

                                            [
  "026:000"
]
                                        

                                            {
  "name": "High Energy Astrophysics Science Archive Research Center",
  "@type": "org:Organization"
}
                                        

                                            [
  "Astrophysics"
]