[vsnet-grb-info 14854] GRB 140419A: Continued Mondy optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  16168
SUBJECT: GRB 140419A: Continued Mondy optical observations
DATE:    14/04/24 15:28:48 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at 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. 
19-21. We took several images in R-filter. On a stacked image we clearly 
detected 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). Details of a photometry are the following:

date        UT start   t-T0     Filter  Exp.  OT
                       (mid, days)       (s)


2014-04-22 14:49:26   3.45342   R     120*60  22.18 +/- 0.09

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