GCN Circular 6387
Subject
GRB 070508: Optical observation limiting magnitude
Date
2007-05-08T09:56:54Z (17 years ago)
From
Alan Gilmore at U of Canterbury,Mt John Obs <alan.gilmore@canterbury.ac.nz>
A. C. Gilmore and P. M. Kilmartin (Mt John Observatory of the University of
Canterbury) report:
We stacked 20 x 120 second clear exposures of the GRB 070508 taken with a SBIG
ST9e CCD on a 0.6 m f/6.4 reflector at Mt John Observatory. The exposure set was
centred on May 8 07:49 UT (3.5 hours after the burst). Our images do not show
any object at the coordinates given by Berger (GCN 6386) to a limiting R
magnitude of approximately 20.5 based on USNO B1.0 stars.
These observations were made as part of the AAVSO GRB Network, and supported by
a grant from the Curry Foundation.