The Soft X-Ray Properties of a Large Optical QSO Sample: ROSAT Observations of the Large Bright Quasar Survey
1995; IOP Publishing; Volume: 450; Linguagem: Inglês
10.1086/176118
ISSN1538-4357
AutoresPaul Green, N. Schartel, Scott F. Anderson, P. C. Hewett, Craig B. Foltz, W. Brinkmann, H. H. Fink, J. Truêmper, B. Margon,
Tópico(s)Astronomy and Astrophysical Research
Resumoview Abstract Citations (150) References (64) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Soft X-Ray Properties of a Large Optical QSO Sample: ROSAT Observations of the Large Bright Quasar Survey Green, Paul J. ; Schartel, Norbert ; Anderson, Scott F. ; Hewett, Paul C. ; Foltz, Craig B. ; Brinkmann, Wolfgang ; Fink, Henner ; Truemper, Joachim ; Margon, Bruce Abstract Of the more than 1000 QSOs in the Large Bright Quasar Survey (LBQS), we study the X-ray properties of 908 that were covered by the ROSAT All-Sky Survey (RASS). These data constitute among the largest, most homogeneous X-ray surveys of QSOs to date, and as such are well suited to the study of the multiwavelength properties of QSOs. Due to the ≈ 600 s RASS exposure times, only 10% of the QSOs are detected in X-rays. However, by stacking X-ray counts, we obtain effectively much more sensitive observations for an average QSO in bins of redshift or luminosity, and for several classes of QSOs. We confirm a correlation of αox with luminosity for the overall sample. For higher redshifts and optical luminosities, radio-loud QSOs appear to become progressively more luminous in X-rays than radio-quiet QSOs. The X-ray properties of a subsample of 36 broad absorption line QSOs suggest that they are strongly absorbed or underluminous in the X-rays, while a subsample of 22 Fe II-strong QSOs is anomalously X-ray bright. Publication: The Astrophysical Journal Pub Date: September 1995 DOI: 10.1086/176118 Bibcode: 1995ApJ...450...51G Keywords: GALAXIES: ACTIVE; GALAXIES: QUASARS: GENERAL; SURVEYS; X-RAYS: GALAXIES full text sources ADS | data products SIMBAD (102) NED (92) CDS (1)
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