GCN Circular 18679
Subject
GRB 151210A: Optical afterglow candidate from LCOGT-Cerro Tololo
Event
Date
2015-12-10T05:33:13Z (10 years ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
Yanhui Han (NAOC/CAS, HUST), Thomas Kruehler (ESO), Dong Xu (NAOC/CAS),
Youdong Hu (IAA-CSIC), and Yin Qing (Geneva Observatory) report:
We observed the field of GRB 151210A (Evans et al., GCN 18678) with the
1-m LCOGT telescope at Cerro Tololo, Chile. Observations started
03:34:06 UT on 2015-12-10 (i.e., 21.2 mins after the GRB), and we
obtained 10x240s R-band images.
Within the XRT error circle (Evans et al., GCN 18678), an uncatalogued
optical source is detected in our stacked image at coordinates:
R. A. = 04:20:28.048
Dec. = -71:15:02.53
with an error radius of ~0.5 arcsec. The object roughly has R~21.5 mag,
calibrated with the nearby USNO B1 field. We thus consider that the
source is very likely the optical afterglow of GRB 151220A.