NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Threshold effects on V/V(max) for gamma-ray burstsThe interpretation of the observed gamma-ray burst V/V(max) statistic in terms of spatial distributions is model-dependent. Detection of gamma-ray bursts requires the counting rate in one or more detectors to exceed a threshold C(lim) determined from a time-dependent background rate B(t). The sampling depth of the burst detector is thus time-dependent, and, if burst sources are nonuniform in space, the observed V/V(max) distribution will be affected by B(t). We demonstrate this effect with a simple geometric distribution of standard candles and argue that V/V(max) statistic without information on threshold variations is insufficient for rigorous data analysis. Peak count rates and threshold values must be given separately for all events in order to facilitate a meaningful comparison of observations with theoretical distribution models.
Document ID
19930068367
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Hartmann, D. H.
(NASA Headquarters Washington, DC United States)
The, L.-S.
(Clemson Univ. SC, United States)
Date Acquired
August 16, 2013
Publication Date
March 1, 1993
Publication Information
Publication: Astrophysics and Space Science
Volume: 201
Issue: 2
ISSN: 0004-640X
Subject Category
Space Radiation
Accession Number
93A52364
Funding Number(s)
CONTRACT_GRANT: N00014-89-J-2034
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available