[vsnet-grb-info 8074] GRB 090618: Mondy optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  9613
SUBJECT: GRB 090618: Mondy optical observations
DATE:    09/07/04 00:32:08 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

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

We observed the afterglow (Schady  et al., GCN 9512; Cenko et al., GCN 9513; 
Perley, GCN 9514; Rujopakarn et al., GCN 9515) of  the Swift GRB 090618 
between  (UT) Jun. 18  18:14 -- 18:43  with 1.5m telescope of Sayan 
observatory (Mondy).   The afterglow is  detected in stacked images. 
Preliminary photometry of the stacked images based on USNO-B1.0 star
1683-0077955 (RA=19 36 36.34   Dec=+78 21 07.00) assuming R=16.57  is 
following:

T0+     Filter, Exposure, mag.,     err.
(d)             (s)

0.4083   R       10x30     18.60 +/-0.10