[vsnet-grb-info 4905] GRB 070714B: confirmation of optical afterglow
GCN Circulars
gcncirc at capella.gsfc.nasa.gov
Mon Jul 16 06:42:40 JST 2007
TITLE: GCN CIRCULAR
NUMBER: 6630
SUBJECT: GRB 070714B: confirmation of optical afterglow
DATE: 07/07/15 21:42:36 GMT
FROM: Andrew Levan at U.of Leicester <anl at star.le.ac.uk>
A.J. Levan (Warwick), N.R. Tanvir (Leicester), D Bonfield (Oxford), Alejo
Martinez-Sansigre (MPI Heidelberg), J. Graham, A. Fruchter (STScI)
report on behalf of a larger collaboration:
We imaged the field of GRB 070714B (Racusin et al. GCNC 6620) with the William
Herschel Telescope (WHT), obtaining at total of 2700s of observations in the
R-band, beginning on July 15 04:17 UT. At the position of the afterglow
candidate of Melandri (GCNC 6621), we detect an object with a magnitude of
R~23.5 (relative to two USNO stars within the field). The observed fading
confirms the association with GRB 070714B. Further observations will be
necessary to determine if the current magnitude is significantly contaminated
by an underlying host galaxy.
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