The hardness evolution of gamma-ray burst pulses

Details The hardness evolution of gamma-ray burst pulses The hardness evolution of gamma-ray burst pulses

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26as..138..401c&link_type=abstract

Astronomy and Astrophysics Supplement, v.138, p.401-402

Astronomy and Astrophysics

Astrophysics

8

Gamma-Ray: Bursts, Observations

Scientific paper

We have analyzed the evolution of the spectral hardness parameter, E_pk (the maximum of the nu F_ν spectrum) as a function of fluence in gamma-ray bursts. We fit 41 pulses within 26 bursts with the trend reported by \cite[Liang & Kargatis (1996)]{lian96} which found that E_pk decays exponentially with respect to photon fluence Phi (t). We also fit these pulses with a slight modification of this trend, where E_pk decays linearly with energy fluence. In both cases, we found the set of 41 pulses to be consistent with the trend.

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