[vsnet-grb-info 14680] GRB 140311A: Mondy optical limits

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15994
SUBJECT: GRB 140311A: Mondy optical limits
DATE:    14/03/18 20:40:18 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

A. Volnova (IKI),  E. Klunko (ISTP), I. Korobtsev (ISTP), M. Eselevich 
(ISTP), A. Pozanenko (IKI) report on behalf of larger GRB follow-up 
collaboration:

We observed the field of GRB 140311A (Racusin et al., GCN 15944)  with 
AZT-33IK telescope of Mondy observatory  on Mar. 12 and Mar. 13. Within 
enhanced Swift-XRT error circle (Evans et al., GCN 15959) we do not 
detect the optical afterglow (Xu et al., GCN 15947;  Klotz et al., GCN 
15952).  Details of the photometry is following:

date       UT start   t-T0      Exp.    Filter  UpperLimit (3sigma)
                     (mid, days) (s)
2014-03-12 17:35:08  0.87145    25x120  R       21.4
2014-03-13 20:29:49  2.01082    51x120  R       21.6

The photometry is based on reference star SDSS-DR9, (R mag,
transformation by Lupton 2005):

N  SDSS_id          R(Lupton)   err
J135713.39+003942.0 18.447      0.015