GCN Circular 12845
Subject
AXP 4U 1042+61: Mondy optical observations
Date
2012-01-17T18:19:43Z (12 years ago)
From
Alina Volnova at SAI MSU <alinusss@gmail.com>
A. Volnova (SAI MSU), I. Korobtsev, E. Klunko (ISTP), A. Pozanenko
(IKI) on behalf of larger GRB follow up collaboration report:
We observed the field of the AXP 4U 1042+61 (Swift �trigger
511611,Barthelmy et al., GCN 12829) with AZT-33IK telescope of Sayan
observatory (Mondy) on Jan., 12 between (UT) 14:11:04 - 15:01:42 with
a mean seeing (FWHM) of about 2.1". We took several series of 60 s
exposures in R-filter. In a stacked image we do not detect any source
in the XRT error circle. The photometry is based on the USNO-B1.0
1517-0055618 star (RA=01 46 21.83, Dec=+61 45 56.9) assuming R2=18.17.
UT_start, � t-t0, Filter, Exposure, � OT � � � uplim
� � � � � � � d s � � � � � � �� � � � �3 sigma
14:11:04 �0.06753 R 50x60 �� � �n/d � � �22.3