On the origin of X-ray Flashes

Details On the origin of X-ray Flashes On the origin of X-ray Flashes

2003-09-10

arxiv.org/abs/astro-ph/0309294v2

Astron.Astrophys.422:381-389,2004

Astronomy and Astrophysics

Astrophysics

10 pages, 6 figures, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20034462

We use the cannonball (CB) model of gamma ray bursts (GRBs) and their afterglows (AGs) to analyze the observational data on X-ray flashes (XRFs) and their AGs. We show that the observations support the CB-model interpretation that XRFs, like GRBs, are produced by the explosions of core-collapse supernovae (SNe) akin to SN1998bw, by jets of highly-relativistic CBs. The XRFs and GRBs are intrinsically identical objects, but the XRFs are viewed from angles (relative to the jet direction) which are typically a few times larger than the typical viewing angles of ``classical'', long-duration GRBs. There should be XRFs, not observed so far, with durations similar to those of short GRBs.

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