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A systematic search for short-term variability of EGRET sources

Wallace, P. M. and Bertsch, D. L. and Bloom, S. D. and Griffis, N. J. and Hunter, S. D. and Kniffen, D. A. and Thompson, D. J. (2000) A systematic search for short-term variability of EGRET sources. In: Fifth Compton Symposium. AIP Conference Proceedings. No.510. American Institute of Physics , Melville, New York, pp. 499-503. ISBN 1563969327 .

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The 3rd EGRET Catalog contains 170 unidentified high-energy (E>100 MeV) gamma-ray sources, and there is great interest in the nature of these sources. One means of determining sources class is the study of flux variability on time scales of days; pulsars are believed to be stable on these scales while blazars are known to be highly variable. In addition, previous work has led to the discovery of 2CG 135+01 and GRO J1838–04, candidates for a new high-energy gamma-ray source class. These sources display transient behavior but cannot be associated with any known blazars. These considerations have led us to conduct a systematic search for short-term variability in EGRET data, covering all viewing periods through cycle 4. Three unidentified sources show some evidence of variability on short time scales; the source displaying the most convincing variability, 3EG J2006–2321, is not easily identified as a blazar.

Item Type:Book Section
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Additional Information:© 2000 American Institute of Physics. Issue Date: 12 April 2000.
Subject Keywords:gamma-ray astronomy; gamma-ray sources (astronomical); astronomical catalogues; brightness; identification; pulsars; quasars; BL Lac-type objects; transients
Series Name:AIP Conference Proceedings
Issue or Number:510
Classification Code:PACS: 98.70.Rz; 95.85.Pw; 95.80.+p
Record Number:CaltechAUTHORS:20111130-095357911
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Official Citation:A systematic search for short-term variability of EGRET sources P. M. Wallace, D. L. Bertsch, S. D. Bloom, N. J. Griffis, S. D. Hunter, D. A. Kniffen, and D. J. Thompson, AIP Conf. Proc. 510, 499 (2000), DOI:10.1063/1.1303256
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:28251
Deposited By: Jason Perez
Deposited On:30 Nov 2011 19:11
Last Modified:03 Oct 2019 03:30

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