GCN Circular 2912
Subject
GRB041224: ROTSE-III Optical Observations
Date
2004-12-25T03:32:43Z (19 years ago)
From
Eli Rykoff at Univ. of Michigan/ROTSE <erykoff@umich.edu>
E. Rykoff, T. McKay, H. Swan (U. Michigan) report on behalf of the ROTSE
collaboration:
ROTSE-IIIc, located at the H.E.S.S. sit at Mt. Gamsberg, Namibia,
responded to Swift GRB041224 (GCN#2908). A manual response was
initiated at 23:20:41 UT, 3 hours after the burst. We took 10 5-s
exposures followed by 250 20-s exposures. All the images were taken
with >95% moon illumination. The unfiltered images were calibrated
relative to USNO A2.0. Individual images have limiting magnitudes
around 17.2. Comparison to DSS (second epoch) reveals no new sources
within the 3-sigma error circle to a limiting magnitude of 18.5 for
stacks of 10 images taken during the first hour of observation.