GCN Circular 12754
Subject
GRB 111228A: GRAS017 optical observations
Date
2011-12-29T05:24:38Z (13 years ago)
From
Veli-Pekka Hentunen at Taurus Hill Obs,A95 <veli-pekka.hentunen@kassiopeia.net>
Veli-Pekka Hentunen, Markku Nissinen and Tuomo Salmi (Taurus Hill
Observatory, Varkaus, Finland) report:
GRAS 017 (Global-Rent-a-Scope, Nerpio, Spain) CDK17 17" (0.43 m)
f/6.8 and FLI ProLine CCD camera were used to detect GRB 111228A
optical afterglow 9.0 hours after the burst trigger. The observations were
started at 2011-12-29 00:35:06 (UT) and stopped at 2011-12-29 00:58:26
(UT). Nine photometric R observations with 120s exposure times were
made. The afterglow was detected at following position RA 10 00 16.07
and DEC +18 17 52.1.
The following magnitude was obtained from the observations using
USNO-B1 1083-0199853 (R2 = 17.28) as the comparison:
Tmid(s)+T0 Filter Exp (sec) Mag Mag err Limit
32522 R 9x120 18.7 0.2 19.8
A png image of our observations is available at the following URL link:
http://cutenews.kassiopeia.net/data/upimages/GRB111228A_web.png