| Issue |
A&A
Volume 470, Number 2, August I 2007
|
|
|---|---|---|
| Page(s) | 497 - 503 | |
| Section | Extragalactic astronomy | |
| DOI | https://doi.org/10.1051/0004-6361:20067036 | |
| Published online | 16 May 2007 | |
RBS1423 – a new QSO with relativistic reflection from an ionised disk*
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany e-mail: mkrumpe@aip.de
Received:
28
December
2006
Accepted:
2
April
2007
Aims.We present the analysis and results of a 20 ks XMM-Newton observation of RBS1423.
Methods.X-ray spectral analysis is used to establish a significantly broadened relativistic iron Kα line from a highly ionised disk.
Results.A QSO at 
was considered to be the optical
counterpart of this ROSAT Bright Survey X-ray source.
Based on the improved XMM-Newton source position
we identified a 
QSO as optical
counterpart to RBS1423.
The 0.2–12 keV X-ray luminosity of this radio-quiet QSO is
6 
1044 erg/s.
The XMM-EPIC spectra are well described by a power law with a
significantly broadened iron Kα line.
Disk line models for both Schwarzschild and Kerr black holes
require hydrogen-like iron ions to fit the measured line profile.
Significant ionisation of the reflection disk is confirmed
by model fits with ionised disk models, resulting in
an ionisation parameter ξ ~ 2000.
Key words: galaxies: active / quasar: general / X-rays: individuals: RBS1423
© ESO, 2007
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