[AAVSO-HEN] GRB080430: optical observations

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TITLE:   GCN CIRCULAR
NUMBER:  7655
SUBJECT: GRB080430: optical observations
DATE:    08/05/01 12:01:37 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen at iki.rssi.ru>

M. Andreev, A. Sergeev (Terskol Branch of Institute of Astronomy), Ju.
Babina (CrAO), V. Petkov, A. Kurenya (BNO INR RAS), A. Pozanenko (IKI) on
behalf of larger GRB follow up collaboration  report:

We observed the afterglow (Klotz et al. GCN 7646, Guidorzi et al. GCN 7647,
Jelinek et al. GCN 7648) of GRB080430 (Guidorzi et al. GCN 7647) with
Zeiss-600 of  Mt.Terskol observatory on Apr.30.  The fading afterglow is
clearly detected in combined images. A photometry of the OT against
USNO-B1.0 stars is following:

UT,              Exposure,   R_mag
(mid time)

Apr.30.8906  15 x 60s  19.10  +/- 0.20
Apr.30.9014  15 x 60s  19.40  +/- 0.20
Apr.30.9130  15 x 60s  19.75  +/- 0.25

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