GCN Circular 10183
Subject
GRB 091117: 2nd epoch of Magellan optical observations
Date
2009-11-20T06:00:05Z (15 years ago)
From
Edo Berger at Harvard <eberger@cfa.harvard.edu>
E. Berger (Harvard) and I. Momcheva (OCIW) report:
"We obtained a second set of optical r-band observations of the BAT
error circle of GRB 091117 (GCN #10171) with IMACS on the Magellan/Baade
6.5-m telescope starting on 2009 Nov 20.03 UT. A comparison to our
first epoch of Magellan observations (GCN #10174) reveals no variable
sources within the BAT error circle or in coincidence with the two XRT
sources (GCNs #10173,10177,10181) to a limit of r~24 mag. The point
source identified as an HII region (GCN #10176) has not varied in
brightness. Further analysis is in progress."