Skip to main content
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

GCN Circular 14742

GRB 130603B: WHT optical afterglow candidate
2013-06-03T22:53:37Z (11 years ago)
Andrew Levan at U.of Leicester <>
A.J. Levan (U. Warwick), N.R. Tanvir, K. Wiersema (U. Leicester), O. Hartoog (Amsterdam), K. Kolle, J. Mendez (ING) and T. Kupfer (Nijmegan) report for a larger collaboration:

We observed the location of GRB 130603B (Melandri et al. GCN 14735) with the William Herschel Telescope, beginning at 21:39 UT approximately 5.8 hours after the burst. In our z and r-band observations we identify a galaxy present in the SDSS DR9 observations of the field with a magnitude of r=20.94.  In addition we identify a point-like source, offset approximately 1" to the SW of this source, with an approximate (+/- 1") position of;

RA(J2000) 11 28 48.16
DEC(J2000) +17:04:18.0

This source is blended with the SDSS galaxy, but appears to be brighter. We suggest this is likely to be the optical afterglow of GRB 130603B."
Looking for U.S. government information and services? Visit