| Issue |
A&A
Volume 422, Number 2, August I 2004
|
|
|---|---|---|
| Page(s) | 381 - 389 | |
| Section | Astrophysical processes | |
| DOI | https://doi.org/10.1051/0004-6361:20034462 | |
| Published online | 09 July 2004 | |
On the origin of X-ray flashes
1
Physics Department and Space Research Institute, Technion, Haifa 32000, Israel e-mail: arnon@physics.technion.ac.il
2
Theory Division, CERN, 1211 Geneva 23, Switzerland
Received:
7
October
2003
Accepted:
12
February
2004
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.
Key words: X-rays: bursts / γ-rays: bursts / stars: supernovae: general
© ESO, 2004
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