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Date and Time of the Query: 2019-06-25 T04:56:41 PDT
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For refcode 1999A&A...346..407G:
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Copyright by European Southern Observatory (ESO). Reproduced by permission
1999A&A...346..407G The complex 0.1-200 keV spectrum of the Seyfert 1 Galaxy NGC 4593. GUAINAZZI M., PEROLA G.C., MATT G., NICASTRO F., BASSANI L., FIORE F., DAL FIUME D., PIRO L. Received 28 September 1998/Accepted 17 March 1999 Abstract: We report on the first observation of the Seyfert 1 galaxy NGC 4593 in the 0.1-200keV band, performed with the BeppoSAX observatory. Its spectral components are for the first time simultaneously measured: a power-law with photon spectral index {GAMMA}=~1.9; the Compton-reflection of the primary power-law; a moderately broad ({sigma}>60eV) K{alpha} fluorescent line from neutral iron; and an absorption edge, whose threshold energy is consistent with K-shell photoionization from OVII. The amount of reflection and the iron line properties are consistent with both being produced in a plane-parallel, X-ray illuminated relativistic accretion disc surrounding the nuclear black hole, seen at an inclination of =~30^deg^. Any cutoff of the intrinsic continuum is constrained to lay above 150keV. The claim for a strongly variable soft excess is dismissed by our data and by a reanalysis of archival ASCA and ROSAT data. Keywords: galaxies: individual: NGC 4593 - galaxies: nuclei - galaxies: Seyfert - X-rays: galaxies
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