GCN Circular 16281
Subject
GRB 140419A: Continued Mondy optical observations
Date
2014-05-16T15:49:12Z (10 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), E. Klunko (ISTP), M. Eselevich (ISTP), I. Korobtsev
(ISTP), A. Pozanenko (IKI) report on behalf of larger GRB follow-up
collaboration:
We continued observation of the Swift GRB 140419A (Marshall et al., GCN
16118) with AZT-33IK telescope of Sayan observatory (Mondy) on Apr.
25-26. We took several images in R-filter with the exposure of 60
seconds. On a stacked image from Apr. 25 we detect the optical afterglow
(Zheng et al., GCN 16119; Guver et al., GCN 16120; Butler et al., GCN
16121; Kuin et al., GCN 16123; Hentunen et al., GCN 16126). On the
stacked frame from Apr. 26 in the Swift/XRT error circle (Osborne et
al., GCN 16124) we do not detect any source.
Details of a photometry are the following:
date UT start t-T0 Filter Exp. OT
(mid, days) (s)
2014-04-25 14:48:25 6.47713 R 90*60 22.81+/-0.17
2014-04-26 14:21:55 7.45841 R 90*60 >21.7 (3 sigma)
The photometry is based on nearby SDSS star, R (gri -> R transformations
by Lupton 2005):
SDSS id R
J082752.69+461357.4 17.381+/-0.018