Physics
Scientific paper
Aug 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aipc..384..228p&link_type=abstract
Gamma-ray bursts: 3rd Huntsville symposium. AIP Conference Proceedings, Volume 384, pp. 228-232 (1996).
Physics
2
Gamma-Ray Sources, Gamma-Ray Bursts, Spectroscopy And Spectrophotometry
Scientific paper
A model independent spectral analysis technique has been developed to study the internal spectral behavior of most of the gamma-ray bursts observed by BATSE, including the weaker ones. Spectral indices are calculated in the 20-100 keV, 50-300 keV, and E>300 keV energy ranges with 64 ms time resolution data. A subset of bursts is identified that exhibits a marked lack of emission above 300 keV, and these bursts have luminosities about an order of magnitude lower than bursts with significant emission above 300 keV. They exhibit an effectively homogeneous intensity distribution as opposed to the rest of the burst population. In addition, evidence is presented indicating that both types of emission are common in many bursts, suggesting that a single source object is capable of generating both. These results strongly favor a source object that produces two different types of emission with varying degrees of superposition.
Briggs Michael Stephen
Kouveliotou Chryssa
Meegan Charles A.
Paciesas William Simon
Pendleton Geoffrey N.
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