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XTE J1550-564; GRB 990123The x-ray transient XTE Jl550-564 (IAUC 7008) was detected in Burst and Transient Source Experiment (BATSE) data beginning on Jan. 21. As of Jan. 23. the one-day averaged flux was 300 mCrab (+/- 20 percent, 20-100 keV), with a hard spectrum (power-law photon-number index -2.3 +/- 0.2). This is a reflare in hard x-rays, following the primary outburst in 1998 Sept.-Oct. (IAUC 7010). The source has been active in soft x-rays (2-12 keV) since about Dec. 18, according to observations by the Rossi X-ray Timing Explorer ASM.
Document ID
19990099687
Acquisition Source
Marshall Space Flight Center
Document Type
Abstract
Authors
Harmon, B. A. (NASA Marshall Space Flight Center Huntsville, AL United States)
Finger, M. H. (NASA Marshall Space Flight Center Huntsville, AL United States)
McCollough, M. L. (NASA Marshall Space Flight Center Huntsville, AL United States)
Zhang, S. N. (NASA Marshall Space Flight Center Huntsville, AL United States)
Paciesas, W. S. (NASA Marshall Space Flight Center Huntsville, AL United States)
Wilson, C. A. (NASA Marshall Space Flight Center Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Publication Information
Publication: International Astronomical Union Conference
Publisher: International Astronomical Union
ISSN: 0081-0304
Subject Category
Astronomy
Report/Patent Number
Circular-7098
ISSN: 0081-0304
Report Number: Circular-7098
Distribution Limits
Public
Copyright
Other

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