Long and Short GRB

Details Long and Short GRB Long and Short GRB

1995-11-16

arxiv.org/abs/astro-ph/9511077v2

Astronomy and Astrophysics

Astrophysics

5 pp., latex, no figures, revised to work around bug in latex compiler

Scientific paper

10.1063/1.51653

We report evidence from the 3B Catalogue that short (T_90 < 10 s) and long (T_90 > 10 s) GRB represent different populations and processes: Their spectral behavior is qualitatively different, with short bursts harder in the BATSE range, but chiefly long bursts detected at higher photon energies; \langle V/V_max \rangle = 0.385 \pm 0.019 for short GRB but \langle V/V_max \rangle = 0.282 \pm 0.014 for long GRB, differing by 0.103 \pm 0.024. Long GRB may be the consequence of accretion-induced collapse, but this mechanism fails for short GRB, for which we suggest colliding neutron stars.

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