GCN Circular 5133
Subject
GRB 060515: ROTSE-III Optical Limits
Date
2006-05-15T02:55:35Z (18 years ago)
From
Eli Rykoff at U of Michigan/ROTSE <erykoff@umich.edu>
E.S. Rykoff (U Mich), W. Rujopakarn (U Mich), B. E. Schaefer (Louisiana
State), S.A. Yost (U Mich), report on behalf of the ROTSE collaboration:
ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB
060515 (Swift trigger 210084, GCN 5132), producing images beginning 6.8
s after the GCN notice time. An automated response took the first image
at 02:28:50.7 UT, 57.8 s after the burst, under windy conditions. We
took 10 5-sec and 10 20-sec exposures before clouds came in. These
unfiltered images are calibrated relative to USNO A2.0 (R).
Comparison to the DSS (second epoch) reveals no new sources within the
3-sigma BAT error circle, for both single images and coadding into sets
of 10. Individual images have limiting magnitudes ranging from
13.9-14.9; we set the following specific limits.
start UT end UT t_exp(s) mlim t_start-tGRB(s) Coadd?
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02:28:50.7 02:28:55.7 5 14.2 57.8 N
02:28:50.7 02:29:57.9 67 15.6 57.8 Y