NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-25 T18:37:12 PDT
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For refcode 1992A&A...266...57W:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1992A&A...266...57W X-ray variability in a sample of Seyfert 1 type AGN R. Walter, T. J.-L. Courvoisier Max-Planck-Institut fur Extraterrestrische Physik, Giesenbachstrafie, W- 8046 Garching bei Munchen, Federal Republic of Germany Observatoire de Geneve, Chemin des Maillettes 51, CH-1290 Sauverny, Switzerland Received May Il, accepted August 5, 1992 Abstract. X-ray observations of several Seyfert 1 type AGN observed many times with EXOSAT are presented and analysed. The spectral parameters are extracted independently in the medium and soft X-ray spectral ranges. The variations observed in the two spectral bands and their relation are discussed and compared to the spectral variations observed in other well known sources. Key words: galaxies: Seyfert - X-rays: galaxies
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