Volume 377, Number 1, October I 2001
|Page(s)||44 - 51|
|Section||Cosmology (including clusters of galaxies)|
|Published online||15 October 2001|
BeppoSAX observations of the Narrow-Line Seyfert 1 galaxy RX J1702.5+3247
Max-Planck-Institut für extraterrestrische Physik, Postfach 1312, 85741 Garching, Germany
2 Department of Physics, University of California-Davis, 1 Shields Ave., Davis, CA 95616, USA
3 Department of Astronomy, University of California, Berkeley, CA 94720 USA
Corresponding author: M. Gliozzi, email@example.com
Accepted: 5 July 2001
We report optical, radio and X-ray observations of the Narrow-Line Seyfert 1 galaxy RX J1702.5+3247. The soft (0.1-2 keV) X-ray flux, measured by BeppoSAX, is characterized by strong variability on short time scales (<500 s). The most extreme amplitude variations require a radiative efficiency exceeding the maximum for a Kerr black hole, implying the presence of relativistic effects. A comparison with archival ROSAT data reveals long term temporal and spectral variability. The 0.1-10 keV spectrum is equally well fitted either by an ionized reflection disk model, or by a broken power law plus a Gaussian line, consistent with a hydrogen-like iron line at 6.97 keV from a highly ionized accretion disk.
Key words: galaxies: active / galaxies: fundamental parameters / galaxies: nuclei / X-rays: galaxies
© ESO, 2001
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