GCN Circular 1591
Subject
GRB021004, Optical Observations
Date
2002-10-06T17:59:20Z (22 years ago)
From
Arne A. Henden at USNO/USRA <aah@nofs.navy.mil>
Arto Oksanen (Nyrola), Mika Aho (Nyrola), Kevin Rivich (Ft. Bend),
Kim Rivich (Ft. Bend), Doug West (West Skies),
and Doug Durig (Cordell-Lorenz) report on behalf of the AAVSO
International GRB team:
We have observed the optical afterglow candidate
(Fox et al., GCN 1564) for GRB021004 (Shirasaki et al.,
GCN 1565; Doty et al., GCN 1568) from multiple observatories.
The preliminary photometric reductions are given below;
these measures will be improved, but indicate the
datasets that are currently available:
Date UT sec x n fil Site mag
021004 19:53 60x22 Rc Nyrola 0.4m 17.90
021004 21:24 120x10 Rc Nyrola 0.4m 17.96
021004 21:48 120x11 Rc Nyrola 0.4m 18.22
021004 22:25 240x9 Rc Nyrola 0.4m 18.37
021004 23:26 240x10 Rc Nyrola 0.4m 18.41
021004 00:13 240x10 V Nyrola 0.4m 19.25
021005 01:04 240x10 Rc Nyrola 0.4m 18.83
021005 01:28 60x12 CR West 0.2m 19.0
021005 02:08 300x3 CR Cordell 0.3m 19.0
021005 04:43 20x60 Rc Ft. Bend 0.9m 19.2
Where CR indicates unfiltered measures, zeropointed
onto the Rc system. Further observations are in progress.
This report can be cited.