[vsnet-grb-info 11495] GRB 120116A: optical upper limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  12899
SUBJECT: GRB 120116A: optical upper limit
DATE:    12/01/27 09:42:18 GMT
FROM:    Alina Volnova at SAI MSU  <alinusss at gmail.com>

 A. Volnova (SAI MSU), E. Litvinenko (UBAI), I. Molotov (KIAM), A.
Pozanenko (IKI) on behalf of  larger GRB follow up collaboration
report:

 We observed the field of the Swift GRB 120116A (Melandri et al., GCN
12834) with ORI-40 telescope of Kitab ISON observatory on Jan. 16
 starting (UT) 18:12:48, i.e. ~6 min after burst trigger. We obtained
several unfiltered images with exposure of 60 seconds. On the stacked
image we do not detect any source within the enhanced XRT error box
(Goad et al., GCN 12846). The photometry is based on nearby reference
stars of USNO-B1.0
 (R2 magnitudes):

 Tstart UT,   T0+,      Filter,  Exposure, OT,   UL (3 sigma)
                (mid, d)             (s)

 18:12:48     0.01480 none    29x60      n/d   19.4