TITLE:   GCN CIRCULAR
NUMBER:  14864
SUBJECT: GRB 130606A: CrAO optical upper limit
DATE:    13/06/11 00:18:42 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

V. Rumyantsev (CrAO), N.Pit' (CrAO), А. Volnova (IKI), A. Pozanenko (IKI) 
report on behalf of  larger GRB  follow-up collaboration:

We observed the field of  the Swift GRB 130606A (Ukwatta  et al., GCN 
14781) with  AZT-11 telescope of CrAO observatory  starting on  June 06
(UT) 21:59:60. We took  several images in R-filter of 180 s exposure. The 
afterglow (Jelinek et al., GCN 14782; Xu et al.,  GCN 14783; Nagayama et 
al., GCN 14784)   is not detected in a combined image.   A photometry  is 
based  on the same SDSS stars we used  in GCN 14806:

Start         T0+,        Filter   Exposure,   OT,        UL (3 sigma)
UT             mid, d                 (s)

21:59:60  0.0489    R        10x180      n/d         20.7