GCN Circular 1351
Subject
GRB020406(?), optical observations
Date
2002-04-10T21:40:53Z (23 years ago)
From
Arne A. Henden at USNO/USRA <aah@nofs.navy.mil>
D. Durig and A. McDermott (Cordell-Lorenz)
and B. Gary (Santa Barbara) report on behalf of the
International AAVSO GRB Network:
We observed the RXTE/ASM revised error box for the
possible GRB 020406 (Smith et al. GCN 1332, 1341)
with the Cordell-Lorenz Observatory 30cm telescope
(ST-9E/AO-7 CCD) and Gary 25cm telescope (ST-8E).
coverage lim mag UTD
entire box CR=17 020407.356
western half CR=20 020407.356
central 80% Rc=17.5 020407.500
remaining 20% Rc=17.1 020407.500
entire box CR=20 020410
Where CR = unfiltered, using R-band zeropoint, and Rc = taken
with a standard Cousins R filter. No new objects were
found in the revised error box to the limiting magnitudes
listed above.
In addition, the entire original box was covered to CR=17
on 020407.4 with no new source detected. The candidate
mentioned in Durig and McDermott (GCN 1338) was
reobserved on 020410 and has shown no fading over
the past 72 hours; it can be eliminated as a possible
afterglow candidate.