SIMBAD references

2011ApJ...731L..16B - Astrophys. J., 731, L16 (2011/April-2)

XMM-newton, Swift, and ROSAT observations of LBQS 0102-2713.


Abstract (from CDS):

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) x1047 erg/s and αox 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/Ledd= 18+33–12. For the dimensionless electron temperature of the plasma cloud θ = kTe/mec2 we derive an upper limit of about 10 keV.

Abstract Copyright:

Journal keyword(s): galaxies: active - quasars: individual: LBQS 0102-2713 - X-rays: galaxies

Simbad objects: 6

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