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Simultaneous observations of gamma-ray bursts with Phebus/Granat and Ulysses GRBWe compare the characteristics of 35 gamma-ray bursts (GRBs) detected simultaneously by Phebus aboard Granat and the Ulysses GRB experiment. Phebus observes a medium to high energy range (100 keV - 100 MeV), while the Ulysses GRB detector is sensitive to lower energy photons (25 - 150 keV). Comparison of the peak counts recorded by these two instruments shows that the variation in burst intensities is more extended for Phebus (above approximately 150 keV) than for Ulysses GRB. This result confirms similar observations from other instruments (Atteia et al. 1991; Mitrofanov et al. 1992; Belli 1992). We discuss the consequences of this behavior for the statistical properties of GRBs, and for the searches for a possible cosmological redshift.
Document ID
19950060202
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Atteia, J.-L.
(CNRS/UPS Toulouse, France)
Barat, C.
(CNRS/UPS Toulouse, France)
Boer, M.
(CNRS/UPS Toulouse, France)
Dezalay, J.-P.
(CNRS/UPS Toulouse, France)
Niel, M.
(CNRS/UPS Toulouse, France)
Talon, R.
(CNRS/UPS Toulouse, France)
Vedrenne, G.
(CNRS/UPS Toulouse, France)
Hurley, K.
(University of California, Berkeley, Berkeley, CA United States)
Sommer, M.
(MPE Garching, Germany)
Kuznetsov, A.
(Russian Academy of Sciences Moscow, Russia)
Date Acquired
August 16, 2013
Publication Date
August 1, 1994
Publication Information
Publication: Astronomy and Astrophysics
Volume: 288
Issue: 1
ISSN: 0004-6361
Subject Category
Astronomy
Accession Number
95A91801
Funding Number(s)
CONTRACT_GRANT: JPL-958056
Distribution Limits
Public
Copyright
Other

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