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Gamma-Ray Bursts: Where are we Now?There has been significant progress recently in our understanding of gamma-ray bursts. The long-sought counterparts at other wavelengths have finally been found for a few bursts. In one case, GRB970508, red-shifted absorption lines have been detected, finally settling the debate about the distance scale. The consensus is that the burst sources lie at cosmological distances, requiring at least about 10**51 ergs to be emitted in gamma rays in just a few seconds. Many mysteries remain. There is no consensus on the nature of the sources, although coalescing neutron stars are the leading candidate. I will describe recent GRB observations from a number of satellites, including the Compton Gamma Ray Observatory, the Hubble Space Telescope, and BeppoSAX, as well as ground-based optical and radio observations. I will relate these observations to our present picture of GRBs and describe how future observations might answer the remaining questions. Finally, I will describe how gamma-ray bursts may be able to tell us something about the early Universe.
Document ID
19990099251
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Meegan, Charles A.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1997
Subject Category
Space Radiation
Meeting Information
Meeting: Non-Sleeping Universe: From Galaxies to the Horizon
Location: Porto
Country: Portugal
Start Date: November 27, 1997
End Date: November 28, 1997
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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