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Issue A&A
Volume 393, Number 1, October I 2002
Page(s) L25 - L28
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20021167



A&A 393, L25-L28 (2002)
DOI: 10.1051/0004-6361:20021167

Letter

The supernova associated with GRB 020405

S. Dado1, A. Dar1 and A. De Rújula2

1  Physics Department and Space Research Institute, Technion, Haifa 32000, Israel
2  Theory Division, CERN, 1211 Geneva 23, Switzerland

(Received 26 July 2002 / Accepted 11 August 2002)

Abstract
We use the very simple and successful Cannonball (CB) model of gamma ray bursts (GRBs) and their afterglows (AGs) to analyze the observations of the mildly extinct optical AG of the relatively nearby GRB 020405. We show that GRB 020405 was associated with a 1998bw-like supernova (SN) at the GRB's redshift that appeared dimmer and redder than SN1998bw because of extinction in the host and our Galaxy. The case for the SN/GRB association - advocated in the CB model - is becoming indubitable. We discuss the extent to which the GRB/SN connection is model-dependent.


Key words: gamma rays: bursts -- supernovae: general

Offprint request: A. Dar, arnon@physics.technion.ac.il

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© ESO 2002


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