On the XMM-Newton spectra of soft X-ray selected QSOs

Details On the XMM-Newton spectra of soft X-ray selected QSOs On the XMM-Newton spectra of soft X-ray selected QSOs

2002-05-31

arxiv.org/abs/astro-ph/0205549v2

Astron.Astrophys.403:869-876,2003

Astronomy and Astrophysics

Astrophysics

A&A accepted

Scientific paper

10.1051/0004-6361:20030395

We study the XMM-Newton spectra of a sample of 32 soft X-ray selected QSOs. Our goal is to check, using the spectra of moderate redshift (z~1.5), faint (f (0.2-8 keV) > 5x10^-15 cgs) broad-line QSOs, previous claims for either significant intrinsic absorption or spectral hardening at high energies. We derive hardness ratios for all sources and furthermore we perform spectral fits for the 11 brighter sources. The majority of sources have steep spectra (photon index >1.9). We find a few QSOs with large amounts of intrinsic absorption, as high as N_H~10^23 cm-2. We find no strong evidence for spectral hardening above 2 keV. The coadded QSO spectrum is well described by a single power-law with photon index of ~1.9, demonstrating that, on average, any effects of absorption are not important. This suggests that the discrepancy between the X-ray background and the (soft X-ray selected) QSO spectrum holds well at the faint fluxes probed here.

Affiliated with

Also associated with

No associations

Rating

On the XMM-Newton spectra of soft X-ray selected QSOs does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the XMM-Newton spectra of soft X-ray selected QSOs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the XMM-Newton spectra of soft X-ray selected QSOs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-75537