A study of gamma ray burst continuum properties presnting evidence for two spectral states in bursts

Physics

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Continuous Spectra, Emission Spectra, Gamma Ray Bursts, Gamma Rays, Inversions, Optical Scanners, Radiation Detectors

Scientific paper

Evidence is presented for the existence of two spectral states contributing simultaneously to the total spectrum observed in many gamma-ray bursts (GRB's). An ensemble of 120 GRB's measured by BATSE were studied, using 4 channel spectral data, to determine in which bursts the spectral states can be most effectively resolved. The technique of summing the low intensity spectra together to get an average spectrum allows for precise characterization of the average low intensity spectral behavior. The 4 and 16 channel spectra obtained by the BATSE Large Area Detectors (LAD's) are analyzed using a model-independent spectral inversion technique. The results of these analyses applied to an individual burst are discussed in detail.

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