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[87.02] The nu F_nu Peak Energy of Gamma Ray Bursts, and its Correlation with Fluence and Peak Flux

V. Petrosian, N. M. Lloyd (Stanford University Dept. of Physics)

The distribution of the peak of the \nu F_\nu spectrum of Gamma Ray Bursts, E_p, and its correlation with fluence and peak flux, are necessary in understanding the nature of GRBs. We present the raw distribution of E_p observed by BATSE, this distribution corrected for detector selection effects, and the distribution of E_p obtained from Solar Maximum Mission (SMM) data, which extends to higher energies than BATSE. We find that the corrected BATSE distribution contains a significant number of high E_p bursts not observed by the detector. This result is quantitatively compared to the SMM E_p distribution. We then present correlations of E_p with fluence and peak flux, accounting for selection effects. We discuss these results in the context of both cosmological effects, as well an intrinsic correlation between E_p and peak flux or fluence at the GRB.

The author(s) of this abstract have provided an email address for comments about the abstract: vahe@astronomy.stanford.edu

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