GCN Circular 2113

Subject

GRB030329: Optical observcations

Event

Date

2003-04-07T15:25:45Z (23 years ago)

From

Vasilij Rumjantsev at CrAO <rum@crao.crimea.ua>

V.Lyuty and V.Metlov (Crimean Laboratory of the Sternberg Astronomical
Institute, Moscow State University) report:

We have observed the GRB030329 OT found by B.A.Peterson and P.A.Price
(GCN 1985Loading...
 
 ) with 60-cm telescope at Crimean laboratory of the Sternberg 
Astronomical Institute. Our observations started at
Mar 31, 18:00 UT. A set of 120 sec. exposures in R (Johnson) filter was
obtained under poor weather conditions.
We have estimated the R magnitudes of the OT using USNO U1050_06350247
star (R=16.06). The results are shown in the table below.

           UT            R
March
        31.7510         17.09
        31.7576         17.04
        31.7604         16.84
        31.7813         16.84
        31.7840         16.94
        31.7868         16.88
        31.7931         17.04
        31.7972         16.90
        31.8056         17.09
        31.8083         16.98
        31.8167         17.12

        Average:        16.98+/-0.03

It is possible that the beginning of the next phase of decrease of OT
brightness took place.

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