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Date and Time of the Query: 2019-06-25 T06:30:44 PDT
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For refcode 1988ApJ...324..767W:
Retrieve 41 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
1988ApJ...324..767W X-RAY OBSERVATIONS OF IRAS SELECTED SEYFERT GALAXIES AND OBSCURATION OF THE BROAD-LINE REGION M. J. WARD Department of Astronomy, University of Washington C. DONE, A. C. FABIAN, AND A. F. TENNANT Institute of Astronomy, Cambridge AND R. A. SHAFER Space Science Department of ESA, Noordwijk Received 1987 March 12; accepted 1987 June 11 ABSTRACT We compare the infrared, optical emission-line, and X-ray properties of four IRAS selected Seyfert galaxies with those of a hard X-ray sample of active galactic nuclei (AGN). For three of the four galaxies the properties are consistent with the objects in the X-ray sample. The anomalous IRAS Seyfert appears to be about 10 times underluminous in hard X-rays. Using a new method involving correlations between Balmer decrement and L_X_/H{beta} we show that the average reddening law appropriate to the hard X-ray sample of AGN is similar to that measured in our Galaxy. By deriving an average intrinsic ratio of L_X_/H{beta} we measure the average unreddened H{alpha} to H{beta} ratio in the broad-line region to be 3.5. Subject headings: galaxies: Seyfert - galaxies: X-rays
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