[vsnet-grb-info 12664] GRB 121128A: optical observation in Mondy observatory

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14024
SUBJECT: GRB 121128A: optical observation in Mondy observatory
DATE:    12/11/30 21:19:10 GMT
FROM:    Alina Volnova at SAI MSU  <alinusss at gmail.com>

A.Volnova (SAI MSU, IKI), E. Klunko (ISTP), A. Pozanenko (IKI) on behalf of
larger GRB follow up collaboration report:

We observed the field of the Swift GRB 121128A (Oates et al., GCN 14007)
with AZT-33IK telescope of Sayan observatory (Mondy). We took several
images in R-filter of 60 s exposure on Nov. 29, between (UT) 10:16:58-
13:33:38 under favorable weather conditions. We do not detect the optical
afterglow (Oates et al., GCN 14007; Japelj et al., GCN 14008) in stacked
images. A photometry of stacked image

t_start,      T0+ (mid), filter,  exp.,   UL (3 sigma)
(UT)          d                            s

10:16:58 1.28450      R       11200  22.1

is based on the same nearby USNO-B1.0 stars used in our previous
observation (Volnova et al., GCN 14019):

USNO-B1.0       RA(J2000)     Dec(J2000) R
1442-0304687 20:02:23.58 +54:16:58.9 16.67
1442-0304744 20:02:29.58 +54:16:57.0 18.66
1442-0304807 20:02:36.33 +54:17:58.9 18.20
1443-0305750 20:02:37.10 +54:18:34.6 17.72
1443-0305710 20:02:32.72 +54:18:46.9 17.25