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Consistency of time dilation in temporal profiles and spectra of gamma-ray burstsIf gamma-ray bursters are at cosmological distances-a possibility suggested by their isotropic distribution and spatial inhomogeneity-then the temporal profiles and spectra of more distant sources will be time dilated compared to those of relatively nearby sources. Analyses of bright and dim Burst and Transient Source Experiment (BATSE) gamma-ray bursts yield a relative time-dilation factor of 2.3 on timescales of pulses and event durations. We redshift the spectra of time intervals near the intensity peaks of the bright sample on a trial grid and compare with spectra of the dim sample. A redshift factor of order two-with wide latitude permitted-brings the spectra of the two brightness groups into alignment. Thus there is coarse agreement with the time-dilation factor found in the temporal domain.
Document ID
19950071312
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Noriss, J. P.
(NASA Goddard Space Flight Center Greenbelt, MD, US, United States)
Nemiroff, R. J.
(NASA Goddard Space Flight Center Greenbelt, MD, US, United States)
Bonnell, J. T.
(Univ. Space Research Association United States)
Scargle, J. D.
(NASA Ames Research Center Moffet Field, CA, US, United States)
Davis, S. P.
(Catholic Univ. Washington, DC, US, United States)
Kouveliotou, C.
(Univ. Space Research Association United States)
Pendleton, G.
(NASA Marshall Space Flight Center Huntsville, AL, US, United States)
Fishman, G. J.
(NASA Marshall Space Flight Center Huntsville, AL, US, United States)
Meegan, C. A.
(NASA Marshall Space Flight Center Huntsville, AL, US, United States)
Paciesas, W. S.
(NASA Marshall Space Flight Center Huntsville, AL, US, United States)
Date Acquired
August 17, 2013
Publication Date
May 1, 1995
Publication Information
Publication: Gamma ray astronomy; E2 Symposium of COSPAR Scientific Commission E, COSPAR Scientific Assembly, 30th, Hamburg, Germany, July 11-21, 1994 .
Volume: 15
Issue: 5
ISSN: 0273-1177
Subject Category
Astrophysics
Accession Number
95A76083
Distribution Limits
Public
Copyright
Other

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