GCN Circular 2032
Subject
GRB 030324, optical search
Date
2003-03-30T22:30:48Z (21 years ago)
From
Peter Garnavich at U of Notre Dame <pgarnavi@miranda.phys.nd.edu>
K. Luhman, T. Megeath, T. Spahr, K.Z. Stanek (CfA), S. Holland
P. Garnavich (Notre Dame)
We observed the error circle of GRB 030324 (GCN 1954) with
the Fred L. Whipple 1.2-m telescope and R filter on three
epochs:
Date Time t (days) R_lim
Mar. 24 06:25 0.134 22.4
Mar. 24 10:37 0.309 22.5
Mar. 26 07:52 2.194 22.7
where R_lim is the 3-sigma limiting magnitude. Visual
comparison and subtraction of the the epochs reveals no new,
strongly variable sources down to the corresponding limits.
A star present on the digitized sky survey at
13:37:19.23 -00:16:21 (2000) is seen to vary between 19.2
and 18.8 in the R-band.
Deep R-band images centered on the error circle, but covering
only the inner 7.4' diameter field were obtained with the
Magellan 6.5-m Clay telescope and LDSS2 imaging/spectrograph:
Date Time t (days) R_lim
Mar. 24 08:14 0.210 23.1
Mar. 25 05:35 1.100 23.3
and subtraction of these images does not reveal any
new, variable sources.
This message may be cited.