[vsnet-grb-info 4056] GRB061121: optical observations

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  5870
SUBJECT: GRB061121: optical observations
DATE:    06/11/27 11:33:09 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

Yu. Efimov, V. Rumyantsev (CrAO), A. Pozanenko (IKI) on behalf of larger GRB
follow up collaboration report:

We observed an afterglow GRB061121 (Page et al., GCN 5823; Yost et al., GCN
5824)  with Shajn 2.6m telescope of CrAO on Nov. 24. A photometry of the
afterglow  in a combined image  is following:

Mid time   Exposure,  R_mag,    Lim_mag (3 sigma)
(UT)          s

Nov. 24.0823   41x120  21.96 +/- 0.07 23.6

The photometry is based on  the same calibration as in our previous GCN
5850.  A power-law decay index between Nov. 23.1040 observation (Efimov et
al., GCN 5850) and Nov. 24.0823 (this circular) is 1.06 and compatible with
the index reported in GCN 5847 (Halpern et al.) for early afterglow decay.

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