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The light curve of a transient X-ray sourceThe Ariel-V satellite monitored the X-ray light curve of A1524-62 almost continuously from 40 days prior to maximum light until its disappearance below the effective experimental sensitivity. The source exhibited maximum light on approximately 4 December 1974, at a level of 0.9 the apparent magnitude of the Crab Nebula in the energy band 3-6 keV. Although similar to previously reported transient sources with a decay time constant of approximately 2 months, the source exhibited an extended, variable pre-flare on-state of about 1 month at a level of greater than approximately 0.1 maximum light. The four bright (greater than 0.2 of the Crab Nebula) transient sources observed during the first half-year of Ariel-V operation are indicative of a galactic disk distribution, and a luminosity at maximum in excess of 10 to the 37th power ergs/sec.
Document ID
19750020905
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Kaluzienski, L. J. (Maryland Univ. College Park, United States)
Holt, S. S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Boldt, E. A. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Serlemitsos, P. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Eadie, G. (Leicester Univ.)
Pounds, K. A. (Leicester Univ.)
Ricketts, M. J. (Leicester Univ.)
Watson, M. (Leicester Univ.)
Date Acquired
September 3, 2013
Publication Date
July 1, 1975
Subject Category
Astrophysics
Report/Patent Number
NASA-TM-X-70938
X-661-75-178
Accession Number
75N28978
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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