GCN Circular 12499
Subject
GRB 111029A: ROTSE-III Optical Limits
Date
2011-10-29T10:11:34Z (13 years ago)
From
Wiphu Rujopakarn at U AZ/Steward <rujopakarn@gmail.com>
W. Rujopakarn (Steward), B. E. Schaefer (Louisiana State), T. Guver (U
Arizona), report on behalf of the ROTSE collaboration:
ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB
111029A (Swift trigger 506519; Troja, GCN 12498), producing images
beginning 7.7 s after the GCN notice time. An automated response took
the first image at 09:46:34.7 UT, 114.2 s after the burst, under
excellent conditions. We took 10 5-sec, 10 20-sec and 20 60-sec
exposures. These unfiltered images are calibrated relative to USNO
A2.0 (R). Imaging is on going.
Comparison to the DSS (second epoch) reveals no new sources within the
3-sigma Swift/BAT error circle or the XRT error circle, for both
single images and coadding into sets of 10; the field is not crowded.
Individual images have limiting magnitudes ranging from 16.9-17.6; we
set the following specific limits.
start UT end UT t_exp(s) mlim t_start-tGRB(s) Coadd?
--------------------------------------------------------------------
09:46:34.7 09:46:39.7 5 17.2 114.2 N
09:46:34.7 09:48:21.8 107 18.0 114.2 Y