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[vsnet-grb-info 943] GRB030329: Optical observations

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  2067
SUBJECT: GRB030329: Optical observations
DATE:    03/04/02 01:25:34 GMT
FROM:    Vasilij Rumjantsev at CrAO  <rum@crao.crimea.ua>

E.Pavlenko, V.Rumyantsev, O.Antoniuk, N.Primak  (CrAO) and A.Pozanenko (IKI)
report:

We continue to monitor the OT of GRB030329 (GCN  2005, 2028, 2050).

The OT found by Peterson and Price  (GCN 1985)  was imaged Cassegrain 38-cm
telescope of CrAO.  Several 240 sec. exposures in  R (Johnson) spectral band
were obtained. Based on filed photometry by A. Henden (GCN 2023)  we
estimate the OT magnitude as

Mid Time (UT)              exposure             OT (R)
Apr 1.8754                   4x240 sec       17.07+/-0.05

Also we refined our estimations of OT within March 29-31.

Cassegrain 38-cm (CCD SBIG ST-7):

JD Hel           UT             V                         R
52728.2526   29.7526    -                    14.03 +/- 0.03
52728.4934   29.9934 15.15 +/- 0.02   -
52728.5072   30.0072 15.22 +/- 0.04   -
52729.2689   30.7689    -                     16.44 +/- 0.04
52729.4301   30.9301    -                     16.40 +/- 0.06
52730.2435   31.7435    -                     16.92 +/- 0.04
52730.3868   31.8868    -                     16.90 +/- 0.08
52730.4023   31.9023    -                     16.91 +/- 0.06


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