The Emission Time of Gamma-Ray Bursts

Details The Emission Time of Gamma-Ray Bursts The Emission Time of Gamma-Ray Bursts

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...522.1069m&link_type=abstract

The Astrophysical Journal, Volume 522, Issue 2, pp. 1069-1078.

Astronomy and Astrophysics

Astronomy

14

Gamma Rays: Bursts

Scientific paper

The concept of emission time tau_N is suggested as a temporal parameter which is complementary to the classical parameters of duration times T_50 and T_90. The emission time is defined as the time of emission of N% of the total fluence. The definition adds the time bins of high fluence in decreasing fluence rank until N% of the fluence has been reached. The emission time interval excludes low-emission intervals of bursts, and so the emission time characterizes the state of high-power emission. The distribution of this new parameter is found to be bimodal for bright bursts. The distributions of emission time tau_30 and tau_50, for groups based on burst intensity, are also compared.

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