[vsnet-grb-info 14684] GRB 140318A: Mondy optical limit

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  15998
SUBJECT: GRB 140318A: Mondy optical limit
DATE:    14/03/19 15:00:05 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 140318A (Cenko et al., GCN 15986)  with 
AZT-33IK telescope of Mondy observatory starting on Mar. 18 (UT) 
13:18:36. Within enhanced Swift-XRT eror circle (Goad et al., GCN 15991) 
we do not detect the optical afterglow (Schulze et al., GCN 15987). 
Details of preliminary photometry is following:

date       UT start   t-T0      Exp.    Filter  UpperLimit (3sigma)
                     (mid, days) (s)
2014-03-18 13:18:36  0.59896    58x120  R       21.1

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

N  SDSS_id          R(Lupton)   err
J121613.64+200907.3 16.984    0.008