[vsnet-grb-info 3201] GRB060428B: optical observation

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  5036
SUBJECT: GRB060428B: optical observation
DATE:    06/04/29 17:06:34 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

V.Rumyantsev (CrAO), V.Biryukov (SAI, MSU), and A.Pozanenko (IKI) on behalf
of larger GRB follow up collaboration report:

We observed the optical afterglow (Price et al. GCN5019; Li et al. GCN5027)
of Swift GRB060428B (Campana et al. GCN 5017) in the R band with Shajn  2.6m
telescope of CrAO between April 28 (UT) 18:43 -- 20:41, i.e. 9.8 -- 11.8 hrs
after the burst onset. The afterglow is visible on a combined image of a
total exposure 3240 sec in a tail of the nearby galaxy (Halpern  et al.
GCN5034) and precise photometry is underway. Based on USNO A2.0 we estimate
limiting magnitude of the combined image as R=24.3.

Combined image can be found in
http://grb.rssi.ru/GRB060428/grb060428_ZTSH_R.gif

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