Supernova and GRB connection: Observations and Questions

Details Supernova and GRB connection: Observations and Questions Supernova and GRB connection: Observations and Questions

2006-04-05

arxiv.org/abs/astro-ph/0604110v1

Astronomy and Astrophysics

Astrophysics

Invited review talk to appear in proceedings of the 16th Annual October Astrophysics Conference in Maryland, "Gamma Ray Bursts

Scientific paper

10.1063/1.2207923

We review the observational status of the supernova/gamma-ray burst connection. Present data suggest that SNe associated with GRBs form a heterogeneous class of objects including both bright and faint hypernovae and perhaps also `standard' Ib/c events. Evidence for association with other types of core-collapse SNe (e.g. IIn) is much weaker. After combining the local GRB rate with the local SN-Ibc rate and beaming estimates, we find the ratio GRB/SNe-Ibc in the range ~0.5-4%. In most SN/GRB associations so far discovered, the SN and GRB events appear to go off simultaneously. In some cases data do not exclude that the SN explosion may have preceded the GRB by a few days. Finally we discuss a number of novel questions started by recent cases of GRB-SN associations.

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