XMM-NEWTON, SWIFT, AND ROSAT OBSERVATIONS OF LBQS 0102-2713
Journal Article
·
· Astrophysical Journal Letters
- Max-Planck-Institut fuer extraterrestrische Physik Garching, PSF 1312, 85741 Garching (Germany)
- GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Planckstr. 1, 64291 Darmstadt (Germany)
We have analyzed the first XMM-Newton, Swift, and archival ROSAT PSPC observations of the quasar LBQS 0102-2713. The object was selected from the ROSAT archive as being notable due to the steep soft X-ray photon index and due to the UV brightness based on Hubble Space Telescope and optical spectroscopic observations. The first XMM-Newton observations carried out in 2009 December and the first Swift observations from 2010 have confirmed the steepness of the soft X-ray photon index, which ranges between 3.35 and 4.41 for the different XMM-Newton and ROSAT detectors, the UV brightness of the source, and the absence of significant absorption by neutral hydrogen. The new data allow a combined spectral fitting to the Swift Ultra-Violet/Optical Telescope and the XMM-Newton/ROSAT data which results in a huge luminosity of (6.2 {+-} 0.2) x 10{sup 47} erg s{sup -1} and {alpha}{sub ox} values ranging between (-1.87 {+-} 0.11) and (-2.11 {+-} 0.12). The nature of the soft X-ray emission can be explained as local Comptonized emission of the UV disk photons in the pseudo-Newtonian potential. The black hole mass is estimated from the Mg II line and translates into an Eddington ratio of L/L{sub edd} = 18{sup +33}{sub -12}. For the dimensionless electron temperature of the plasma cloud {theta} = kT{sub e}/M{sub e}c{sup 2} we derive an upper limit of about 10 keV.
- OSTI ID:
- 21562743
- Journal Information:
- Astrophysical Journal Letters, Journal Name: Astrophysical Journal Letters Journal Issue: 1 Vol. 731; ISSN 2041-8205
- Country of Publication:
- United States
- Language:
- English
Similar Records
X-RAY SPECTROSCOPY OF AS1101 WITH CHANDRA, XMM-NEWTON, AND ROSAT: BANDPASS DEPENDENCE OF THE TEMPERATURE PROFILE AND SOFT EXCESS EMISSION
The expected rates of X-ray flashes from GRBs in ROSAT and preliminary search results
The expected rates of X-ray flashes from GRBs in ROSAT and preliminary search results
Journal Article
·
Sat Sep 10 00:00:00 EDT 2011
· Astrophysical Journal
·
OSTI ID:21584891
The expected rates of X-ray flashes from GRBs in ROSAT and preliminary search results
Conference
·
Mon Nov 30 23:00:00 EST 1998
·
OSTI ID:291111
The expected rates of X-ray flashes from GRBs in ROSAT and preliminary search results
Journal Article
·
Fri May 01 00:00:00 EDT 1998
· AIP Conference Proceedings
·
OSTI ID:641444