Skip to main content
Testing. You are viewing the public testing version of GCN. For the production version, go to
New Announcement Feature, Code of Conduct, Circular Revisions. See news and announcements

GCN Circular 14893

GRB 130603B: HST limits on an underlying supernova
2013-06-13T21:18:52Z (11 years ago)
Nial Tanvir at U.Leicester <>
N. R. Tanvir (U. Leicester), A. J. Levan (U. Warwick), A. S. Fruchter (STScI),
J. Hjorth (DARK/NBI) and K. Wiersema (U. Leicester) report:

We observed the location of GRB 130603B with HST/ACS and
WFC3/IR.  The host galaxy is clearly resolved as a disturbed spiral,
and it appears that the GRB occurred close to a spiral
arm that seems to have been tidally distorted or drawn out
by interaction with a smaller neighbour.

Our provisional analysis finds a point-source limit of F606W>27.6,
corresponding to M_V~-14.3, at the location of the GRB.  This is 
approaching a factor ~100 below what would be expected if there 
were a rising supernova comparable to SN1998bw, ruling out such an 
association for this burst.  It also rules out some part of the parameter
space of other radioactively-powered transients that have been
proposed may accompany short GRBs.

The position of the GRB lands on a region of extended emission in
the F160W (H') filter of WFC3/IR.    Another epoch scheduled for a
few weeks from now will allow a deeper search for a counterpart
through image subtraction.

We thank the STScI director and staff for rapidly expediting
these observations.
Looking for U.S. government information and services? Visit