[vsnet-grb-info 11808] GRB 120320A: optical upper limit in Mondy observatory

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  13199
SUBJECT: GRB 120320A: optical upper limit in Mondy observatory
DATE:    12/04/03 18:25:11 GMT
FROM:    Alina Volnova at SAI MSU  <alinusss at gmail.com>

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

We observed the field of the Swift GRB 120320A  (Markwardt  et al.,
GCN 13071) with AZT-33IK telescope of Sayan observatory (Mondy)  on
Mar. 20 under mean seeing 2.6 arcsec. We took several images in
R-filter of  60 s exposure on Mar.20, between (UT) 14:45:13 -
15:58:25.

Within enhanced XRT position (Beardmore et al.,  GCN 13075) we do not
detect any  source in a combined image. Photometry is based on nearby
USNO-B1.0 stars, R2-values.

UT start,    t-t0           filter      Exp.        OT      UL (3 sigma)
              (mid, days)             (s)

14:45:13   0.14275    R       72x60         n/d      21.3