GCN Circular 10956
Subject
GRB 100713A: GROND upper limits
Event
Date
2010-07-14T10:11:51Z (15 years ago)
From
Jochen Greiner at MPI <jcg@mpe.mpg.de>
M. Nardini, T. Kruehler, and J. Greiner (all MPE Garching) report on behalf
of the GROND team:
We observed the field of GRB 100713A (INTEGRAL trigger 6041; Mereghetti et
al., GCN #10951) 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 at La Silla
Observatory (Chile).
Observations started at 23:46 UT on 2010 July 13th, 9.3 h after the GRB
trigger. They were performed at an average seeing of 2.6" and at an
average airmass of 2.5. With a total integration time of 13.2 min (12 min
for the IR), we do not detect any source within the Swift-XRT error circle
reported by D'Elia et al. (GCN #10952) down to
g' > 23.8,
r' > 22.9,
i' > 22.0,
z' > 21.5,
J > 18.8,
H > 17.4 and
K > 16.8
The given limits are derived based on calibrating the images against USNO
B1 catalogue and 2MASS field stars and are not corrected for the Galactic
foreground extinction corresponding to a reddening of E_(B-V)= 0.056 in
the direction of the burst (Schlegel et al. 1998).
We confirm the presence of a faint source close to the border of the XRT
error circle at the coordinates reported by D'Avanzo et al. (GCN 10954).