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GCN Circular 12623

GRB 111201A: GMG optical observation
2011-12-05T14:00:31Z (12 years ago)
Dong Xu at Weizmann Inst <>
X.-H. Zhao (YNAO), D. Xu (WIS), J.-R. Mao, J.-M. Bai (YNAO) report:

We observed the field of GRB 111201A (Sakamoto et al., GCN 12608) with
the 2.4m Gao-Mei-Gu (GMG) telescope equipped with YFOSC. Observation
were carried out in a very poor seeing of ~3.6" and 6x600s R-band
images were obtained starting at 21:38:32 UT on 2nd Dec. 2011 (i.e.,
31.27hrs after the burst).

We found a faint and apparently extended source on the southern border
of the XRT error circle (Kennea et al., GCN 12609) at coordinates


with a circle error radius of ~4 arcsec. The source had R~22.7 mag,
calibrated with nearby USNO B1 stars.

We thank W.-M. Yi, H.-Y. Gao and F. He for performing these observations.
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