GCN Circular 12339
Subject
GRB 110915A: GMG optical upper limit
Date
2011-09-15T17:05:38Z (13 years ago)
From
Dong Xu at Weizmann Inst <dong.dark@gmail.com>
X.-H. Zhao (YNAO), D. Xu (WIS), J.-R. Mao & J.-M. Bai (YNAO) report on
a larger collaboration:
We observed the XRT field (Evans, GCN 12336) of GRB 110915A (Holland
et al., GCN 12335) with the 2.4m GMG telescope in Yunnan, China
equipped with YFOSC. Observations started at 13:58:09 UT, 15th Sep.
2011 (i.e., 0.6236 hr after the burst), and 1x20 min R-band and 1x20
min V-band images were obtained under the cloudy weather.
No optical source was present within the XRT error circle in GCN
#12336, which sets a 3\sigma upper limit of R~21.6 mag, calibrated
with the USNO B1 catalog.