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Detection of a flaring low-energy gamma-ray sourceWe report the detection of a flaring gamma-ray source by the University of New Hampshire (UNH) balloon-borne coded aperture gamma-ray telescope (DGT) on 1984 October 2. The source was detected at the significance level of 7.2 sigma over the energy range 160-2000 keV. The intensity in the range (160-200) keV was 1.1 Crab. The best-fit position of the source is given by R.A. = 3h 25.8m and Decl. = 67 deg 653 min and is located in the constellation of Camelopardia. The source was visible within the Field of View (FOV) of the telescope for approximately = 2 hr and exhibited signs of flaring. The derived photon spectrum can be equally fitted by an optically thin bremsstrahlung distribution of kT approximately = 52 keV or a power law of the form, dN(E)/dE = 3.7 x 10(exp -6) (E/400)(exp -4.5) photons/sq cm/keV. We compare its spectral characteristics ad energy output to various types of fast X-ray transients. No measurable flux could be detected from CG 135+1, the COS B source which was in the FOV and therefore, we present 2 sigma upper flux limits on its spectral emission over the energy range 160 keV to 9.3 MeV.
Document ID
19950049393
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Bhattacharya, Dipen
(Univ. of California, Riverside, CA United States)
Owens, Alan
(Leicester Univ. Leicester, United Kingdom)
Date Acquired
August 16, 2013
Publication Date
July 20, 1994
Publication Information
Publication: The Astrophysical Journal, Part 1
Volume: 430
Issue: 1
ISSN: 0004-637X
Subject Category
Astronomy
Accession Number
95A80992
Funding Number(s)
CONTRACT_GRANT: NAG6-12
Distribution Limits
Public
Copyright
Other

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