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Properties of the Second Outburst of the Bursting Pulsar (GRO J1744-28) as Observed with BATSEOne year after its discovery, the Bursting Pulsar (GRO J1744-28) went into outburst again, displaying the hard X-ray bursts and pulsations that make this source unique. We report on Burst and Transient Source Experiment (BATSE) observations of both the persistent and burst emission for this second outburst and draw comparisons to the first. The second outburst was smaller than the first in both duration and peak luminosity. The persistent flux, burst peak flux and burst fluence were all reduced in amplitude by a factor approximately 1.7. Despite these differences, the average burst occurrence rate and average burst durations were roughly the same through each outburst. Similar to the first outburst, no spectral evolution was found within bursts and the parameter alpha was very small at the start of the outburst (alpha = 2.1 +/- 1.7 on 1996 December 2). Although no spectral evolution was found within individual bursts, we find evidence for a small (20%) variation of the spectral temperature during the course of the second outburst.
Document ID
19990064628
Document Type
Reprint (Version printed in journal)
Authors
Woods, P.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Kouveliotou, C.
(NASA Marshall Space Flight Center Huntsville, AL United States)
vanParadijs, J.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Briggs, M. S.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Wilson, C. A.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Deal, K. J.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Harmon, B. A.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Fishman, G. J.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Lewin, W. H.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Kommers, J.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1998
Subject Category
Space Radiation
Distribution Limits
Public
Copyright
Other
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