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Rapid X-ray variability from the Seyfert 1 galaxy NGC 4051Strong variable X-ray emission from the nearby low luminosity Seyfert 1 galaxy NGC 4051 was discovered during observations with the imaging proportional counter of the Einstein Observatory. During one 2304 second observation, the X-ray flux more than doubled in an approximately linear fashion, and a 70 percent increase for 150 seconds was seen during another 968 second observation. Evidence is presented which demonstrates that the X-ray spectrum of NGC 4051 is unusually soft compared to Seyfert 1 galaxies or QSOs. The emission mechanism is probably not synchrotron or synchrotron self-Compton, but the emission can be plausibly explained by various black hole accretion models. Previously announced in STAR as N83-23265
Document ID
19830056126
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
doi:10.1086/184050
Authors
Marshall, F. E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Holt, S. S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Mushotzky, R. F. (NASA Goddard Space Flight Center Laboratory for High Energy Astrophysics, Greenbelt, MD, United States)
Becker, R. H. (Virginia, Polytechnic Institute and State University Blacksburg, VA, United States)
Date Acquired
August 11, 2013
Publication Date
June 15, 1983
Publication Information
Publication: Astrophysical Journal, Part 2 - Letters to the Editor
Volume: 269
ISSN: 0004-637X
Subject Category
Astrophysics
Report/Patent Number
ISSN: 0004-637X
Accession Number
83A37344
Distribution Limits
Public
Copyright
Other

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