GCN Circular 11337
Subject
GRB 101011A, GROND upper limits
Event
Date
2010-10-12T13:43:38Z (16 years ago)
From
Sylvio Klose at TLS Tautenburg <klose@tls-tautenburg.de>
M. Nardini, T. Kruehler (both MPE Garching), S. Klose, A. Rossi (both TLS
Tautenburg), and J. Greiner (MPE Garching) report on behalf of the GROND
team:
We observed the field of GRB 101011A (Swift trigger #436094; Cannizzo et
al. 2010, GCN #11331; Markwardt et al. 2010, GCN #11332) simultaneously in
g'r'i'z'JHK with GROND (Greiner et al. 2008, PASP 120, 405) mounted at the
2.2 m MPI/ESO telescope on LaSilla. Observations started at 00:10 UT,
October 12, i.e. seven hours after the burst once the field became visible
over La Silla.
In stacked images with a mid-time of 1:06 UT (seeing 2.2 arcsec; mean
airmass 1.8) we do not detect any source at the position of the faint
optical transient seen by UVOT (Holland et al. 2010, GCN #11334) down to
the following limits (3 sigma, AB system):
g' > 24.4,
r' > 23.7,
i' > 22.7,
z' > 22.5,
J > 22.1,
H > 21.5.
These upper limits have been calibrated based on USNO and 2MASS stars.