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Broad iron K emission line and spectral variability of the Seyfert 2 galaxy IRAS 18325-5926A very broad iron K alpha emission line is observed in the Advanced Satellite for Cosmology and Astrophysics (ASCA) spectrum of the Seyfert 2 galaxy IRAS 18325-5926. The line profile is peaked at 6.9 keV and skewed down to 4 keV. The breadth and shift of the line energy can be interpreted by Doppler and relativistic effects in a cold accretion disk about a black hole with a intermediate inclination of between 40 and 50 deg. The steep spectral slope and the fast variability on a timescale of 10(exp 4) s are confirmed for this object. A study of spectral variability reveal that the X-ray flux change mainly occurred above 1 keV and the soft X-ray component below 1 keV appears to be less variable or constant and should lie outside of the nuclear obscuration.
Document ID
19970024667
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Iwasawa, K. (Institute of Astronomy Cambridge, United Kingdom)
Fabian, A. C. (Institute of Astronomy Cambridge, United Kingdom)
Mushotsky, R. F. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Brandt, W. N. (Institute of Astronomy Cambridge, United Kingdom)
Awaki, H. (Kyoto Univ. Japan)
Kunieda, H. (Nagoya Univ. Nagoya, Japan)
Date Acquired
August 17, 2013
Publication Date
February 1, 1996
Subject Category
Astronomy
Accession Number
97N24424
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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