[vsnet-grb-info 17263] GRB 151118A: AAO optical upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  18627
SUBJECT: GRB 151118A: AAO optical upper limit
DATE:    15/11/20 15:09:39 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

E. Mazaeva (IKI), R. Inasaridze (AAO), V. Ayvazian (AAO), 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 151118A (Amaral-Rogers et  al.,
GCN 18611) with AS-32 (0.7m) telescope of Abastumani Observatory 
starting on Nov. 18 (UT) 18:08:09.  We do not detect any source within
enhanced XRT error circle (Evans et al., GCN 18614):

Date       UT start    t-T0     Filter  Exp.     UL(3 sigam)
                        (mid, days)      (s)

2015-11-18 18:08:09    0.65922  None    35*120   22.1

The photometry is based on nearby USNO-B1.0 stars
USNO-B.1_id     R2
1559-0079254	15.66
1559-0079234	16.18
1559-0079286	15.60
1559-0079243	16.15
1558-0078596	14.88