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Record Details

Record 98 of 88666
Detection of a flaring low-energy gamma-ray source
External Online Source: doi:10.1086/174412
Author and Affiliation:
Bhattacharya, Dipen(Univ. of California, Riverside, CA, United States)
Owens, Alan(Leicester Univ., Leicester, United Kingdom)
Abstract: We 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.
Publication Date: Jul 20, 1994
Document ID:
19950049393
(Acquired Dec 28, 1995)
Accession Number: 95A80992
Subject Category: ASTRONOMY
Document Type: Journal Article
Publication Information: The Astrophysical Journal, Part 1 (ISSN 0004-637X); 430; 1; p. 371-375
Publisher Information: United States
Contract/Grant/Task Num: NAG6-12
Financial Sponsor: NASA; United States
Organization Source: NASA; Washington, DC, United States
NASA Wallops Flight Center; Wallops Island, VA, United States
Description: 5p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: EXTRATERRESTRIAL RADIATION; GAMMA RAY ASTRONOMY; GAMMA RAY SPECTRA; GAMMA RAYS; RADIATION SOURCES; ASTRONOMICAL SPECTROSCOPY; BALLOON-BORNE INSTRUMENTS; BREMSSTRAHLUNG; GAMMA RAY TELESCOPES; PHOTONS; SPECTRAL EMISSION; X RAY SOURCES
Imprint And Other Notes: The Astrophysical Journal, Part 1 vol. 430, no. 1 p. 371-375 July 20, 1994
Miscellaneous Notes: Research sponsored by NASA
Availability Source: Other Sources
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