[HB89] 0102-272: a quasar with an extremely steep soft photon index?

Details [HB89] 0102-272: a quasar with an extremely steep soft photon index? [HB89] 0102-272: a quasar with an extremely steep soft photon index?

Oct 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008xmm..prop...16b&link_type=abstract

XMM-Newton Proposal ID #06007101

Other

Active Galactic Nuclei, Quasars, Bl-Lac Objects, X-Ray Background, [Hb89] 0102-272

Scientific paper

We report on a quasar with a steep soft 0.1-2.4 keV X-ray photon index based on ROSAT PSPC observations. [HB89] 0102-272 exhibits a photon index of (6.55+-2.07). A second observation of the object confirms the steep photon index of (6.40+-2.20). This is the steepest spectral energy distribution in the 0.1-2.4 keV energy band from an extragalactic object reported so far. We intend to find out, whether other models can explain the ROSAT data. We show that an ionized absorber can flatten the spectrum significantly. The 2.4-10 keV energy distribution will be determined for the first time. As the object is expected to be more complex we ask for a 50 ks snapshot observation in order to determine the significance of additional spectral components.

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