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@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