GCN Circular 7107
Subject
GRB 071112B: Gemini Image Differencing
Date
2007-11-18T18:40:47Z (17 years ago)
From
Josh Bloom at UC Berkeley <jbloom@astron.berkeley.edu>
D. Kocevski and J. S. Bloom (U.C. Berkeley), on behalf of a larger
collaboration, report:
"We performed image subtraction between multiple r-band observations
of the error box of SHB 071112B (Perri et al. GCN 7058; Fenimore et
al. 7071) on Gemini South. The first epoch of observations began at
2007-11-13 00h14m UTC (airmass ~2.0) followed by a second epoch ~4
hours later at 2007-11-13 04h08m UTC (airmass ~2.6), with total
exposures of 1800 sec and 1043 sec, seconds respectively. Image
subtraction using the public IPP package (*) software shows no
variable sources to r=23.7 mag (3 sigma) within the >95% of the BAT
error circle. No further observations are planned."
This message may be cited.
* See http://pan-starrs.ifa.hawaii.edu/project/IPP/software/