EDP Sciences
Free access
Volume 377, Number 1, October I 2001
Page(s) 44 - 51
Section Extragalactic astronomy
DOI http://dx.doi.org/10.1051/0004-6361:20011014

A&A 377, 44-51 (2001)
DOI: 10.1051/0004-6361:20011014

BeppoSAX observations of the Narrow-Line Seyfert 1 galaxy RX J1702.5+3247

M. Gliozzi1, W. Brinkmann1, S. A. Laurent-Muehleisen2, E. C. Moran3 and J. Whalen2

1  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

(Received 23 February 2001 / 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

Offprint request: M. Gliozzi, mgliozzi@xray.mpe.mpg.de

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