The supernova associated with GRB 020405

Details The supernova associated with GRB 020405 The supernova associated with GRB 020405

2002-07-24

arxiv.org/abs/astro-ph/0207532v2

Astron.Astrophys. 393 (2002) L25-L28

Astronomy and Astrophysics

Astrophysics

Accepted for publication in A&A Letters

Scientific paper

10.1051/0004-6361:20021167

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.

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