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Derivation of a sample of gamma-ray bursts from BATSE DISCLA data

Schmidt, Maarten (2000) Derivation of a sample of gamma-ray bursts from BATSE DISCLA data. In: Gamma Ray Bursts: 5th Huntsville Symposium, Huntsville, AL, 18-22 October 1999. American Institute of Physics Conference Proceedings. No.526. American Institute of Physics , Melville, NY, pp. 8-12. ISBN 1-56396-947-5. http://resolver.caltech.edu/CaltechAUTHORS:SCHMaipcp00b

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Abstract

We have searched for gamma-ray bursts (GRBs) in the BATSE DISCLA data over a time period of 5.9 years. We employ a trigger requiring an excess of at least 5sigma over background for at least two modules in the 50–300 keV range. After excluding certain geographic locations of the satellite, we are left with 4485 triggers. Based on sky positions, we exclude triggers close to the sun, to Cyg X-1, to Nova Persei 1992 and the repeater SGR 1806–20, while these sources were active. We accept 1013 triggers that correspond to GRBs in the BATSE catalog, and after visual inspection of the time profiles classify 378 triggers as cosmic GRBs. We denote the 1391 GRBs so selected as the "BD2 sample." The BD2 sample effectively represents 2.003 years of full sky coverage for a rate of 694 GRBs per year. Euclidean V/Vmax values have been derived through simulations in which each GRB is removed in distance until the detection algorithm does not produce a trigger. The BD2 sample produces a mean value <V/Vmax>=0.334±0.008.


Item Type:Book Section
Additional Information:©2000 American Institute of Physics. Issue Date: September 8, 2000.
Subject Keywords:gamma-ray astronomy, gamma-ray sources (astronomical), sky brightness, celestial mechanics, extrasolar planets, astrophysical radiation mechanisms, astronomical techniques, cosmic ray energy spectra
Series Name:American Institute of Physics Conference Proceedings
Issue or Number:526
Record Number:CaltechAUTHORS:SCHMaipcp00b
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:SCHMaipcp00b
Alternative URL:http://dx.doi.org/10.1063/1.1361497
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10018
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:05 Apr 2008
Last Modified:26 Dec 2012 09:56

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