NDLI: Gamma-ray burst precursor activity as observed with batse

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Gamma-ray burst precursor activity as observed with batse

Content Provider	NASA Technical Reports Server (NTRS)
Author	Fishman, Gerald J. Paciesas, William S. Koshut, Thomas M. Meegan, Charles A. Kouveliotou, Chryssa Pendleton, Geoffrey N. Briggs, Michael S. vanParadijs, Jan
Copyright Year	1995
Description	Gamma-ray burst time histories often consist of multiple episodes of emission with the count rate dropping to the background level between adjacent episodes. We define precursor activity as any case in which the first episode (referred to as the precursor episode) has a lower peak intensity than that of the remaining emission (referred to as the main episode) and is separated from the remaining burst emission by a background interval that is at least as long as the remaining emission. We find that approx. 3% of the bursts observed with the Burst and Transient Source Experiment (BATSE) on Compton Gamma Ray Observatory (CGRO) satisfy this definition. We present the results of a study of the properties of these events. The spatial distribution of these sources is consistent with that of the larger set of all BATSE gamma-ray bursts: inhomogeneous and isotropic. A correlation between the duration of the precursor emission and the duration of the main episode emission is observed at about the 3 sigma confidence level. We find no meaningful significant correlations between or among any of the other characteristics of the precursor or main episode emission. It appears that the characteristics of the main episode emission are independent of the existence of the precursor emission.
File Size	788484
Page Count	10
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19970010852
Archival Resource Key	ark:/13960/t49p80140
Language	English
Publisher Date	1995-10-01
Access Restriction	Open
Subject Keyword	Space Radiation Isotropy Time Dependence Spatial Distribution Spaceborne Astronomy Gamma Ray Observatory Inhomogeneity Statistical Tests Gamma Ray Bursts Confidence Limits Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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