[vsnet-grb-info 9578] GRB 100805A: ROTSE-III Optical Limits
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Thu Aug 5 13:56:12 JST 2010
TITLE: GCN CIRCULAR
NUMBER: 11048
SUBJECT: GRB 100805A: ROTSE-III Optical Limits
DATE: 10/08/05 04:56:08 GMT
FROM: Shashi Bhushan Pandey at ROTSE <shaship at umich.edu>
S. B. Pandey (U Mich) and W. Zheng (U Mich), report on behalf of the ROTSE
collaboration:
ROTSE-IIIb, located at McDonald Observatory, Texas, responded to GRB
100805A (Swift trigger 430957; Hoversten , E. A., GCN 11047), producing
images beginning 6.2 s after the GCN notice time. An automated response
took the first image at 04:13:39.2 UT, 50.9 s after the burst, under fair
conditions. We took 10 5-sec, 10 20-sec and 10 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 at the Swift/UVOT position, for both
single images and coadding into sets of 10. Individual images have limiting
magnitudes ranging from 16.1-17.3; we set the following specific limits.
start UT end UT t_exp(s) mlim t_start-tGRB(s) Coadd?
--------------------------------------------------------------------
04:13:39.2 04:13:44.2 5 16.1 50.9 N
04:14:59.3 04:19:41.7 282 18.0 131.0 Y
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