GCN Circular 11837
Subject
GRB 110328A / Swift J164449.3+573451: optical observations
Event
Date
2011-03-30T01:45:38Z (15 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (SAI MSU), A. Pozanenko (IKI), E. Klunko (ISTP) on behalf of
larger GRB follow up collaboration report:
We observed the field of GRB 110328A / Swift J164449.3+573451 (Cummings et
al. GCN 11823) with AZT-33IK telescope of Sayan observatory (Mondy) starting
on March 28 (UT) 13:46:35, i.e. 6 minutes after second trigger (Barthelmy et
al. GCNC 11824).
We identified the optical counterpart (Cenko et al. GCN 11827, Leloudas et
al. GCN 11830) in the combined image of a total exposure of 67 min. The
photometry of the optical counterpart in the combined image is R=21.50 +/-
0.10 and based on the USNO-A2.0 star 1425-08596694 assuming R=16.6. The
photometry is still preliminary and calibration of field stars is necessary
(Cenko et al. GCN 11827) to confirm the variable nature of the optical
counterpart.
[GCN OPS NOTE(30apr11): Per author's request, Elunko was changed to Klunko.]