GCN Circular 18530
Subject
GRB 151029A: LCOGT-FTS afterglow observations
Date
2015-10-29T15:42:47Z (9 years ago)
From
Cristiano Guidorzi at Ferrara U,Italy <guidorzi@fe.infn.it>
S. Dichiara (U. Ferrara, ICRANet), C. Guidorzi (U. Ferrara), S.
Kobayashi (LJMU), A. Gomboc (U. Ljubljana) on behalf of a larger
collaboration report:
The 2-m LCOGT Faulkes Telescope South began observing Swift GRB 151029A
(Ukwatta et al. GCN 18522) on October 29, 09:33 UT (1.7 hours after the
burst trigger) with SDSS R and I filters. We marginally detect the
optical afterglow (Ukwatta et al. GCN 18522; Knust et al. GCN 18523;
Tanvir et al. GCN 18524) due to poor sky conditions with the following
magnitudes:
Mid Time Exposure Filter Magnitude
(hours) (s)
-------------------------------------------------------
1.8 5x120 R 20.6 +- 0.4
2.0 5x120 I 21.0 +- 0.5
-------------------------------------------------------
Calibration is done against nearby USNOB-1 star RA(J2000)=02:34:10.069,
DEC(J2000)=-35:24:13.54, assuming R2=16.95 mag and I=17.63 mag.