NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-16 T16:14:17 PDT
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For refcode 1997A&A...320..696S:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1997A&A...320..696S The Piccinotti AGN sample observed in the ROSAT All-Sky Survey. Schartel N., Schmidt M., Fink H.H., Hasinger G., Truemper J. Abstract. The ROSAT All-Sky Survey observations of the complete hard X- ray selected Piccinotti AGN sample demonstrate that the soft X-ray spectra of almost none of the sample AGN can be simply represented by the power law extrapolated from the 2-10keV range. A comparison of the soft X-ray spectra of the sample members with their medium energy continua measured with HEAO-1 and EXOSAT revealed that about half of the AGN in the sample are intrinsically absorbed. Furthermore, almost all sample AGN show excess fluxes in their soft X-ray emission. These features in the spectra of active galactic nuclei have an important impact on the interpretation of the cosmic soft X-ray background. Key words: galaxies: active - galaxies: Seyfert - galaxies: quasars - X- rays: galaxies
Retrieve 31 NED objects in this reference.
Please click here for ADS abstract

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