GCN Circular 18480
Subject
GRB 151027A : ISON-NM early optical detection
Event
Date
2015-10-27T05:47:05Z (11 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
L. Elenin (KIAM), E. Mazaeva (IKI), A. Volnova (IKI), I. Molotov (KIAM),
A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 151027A (Maselli et al., GCN 18478)
with 0.4-m telescope of ISON-NM observatory in robotic mode starting on
Oct., 27 (UT) 03:59:43 i.e. 79 seconds after burst trigger. We obtained 50
unfiltered images of 30 s exposure. We clearly detect the optical
counterpart of GRB 151027A (Maselli et al., GCN 18478; Zheng and
Filippenko, GCN 18479) in coordinates (J2000) 18 09 56.69 +61 21 13.2. In
the first image we estimated brightness of the optical counterpart as ~14m.