[vsnet-grb-info 12687] GRB 121209A: UVOT Observation

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  14046
SUBJECT: GRB 121209A: UVOT Observation
DATE:    12/12/09 22:27:57 GMT
FROM:    Mike Siegel at PSU/Swift MOC  <siegel at swift.psu.edu>

M. H. Siegel (PSU) and A. Maselli (INAF-IASFPA) report on behalf of the
Swift/UVOT team:

UVOT took a finding chart exposure of 150 seconds with the White filter
starting 96 seconds after the BAT trigger. No credible afterglow candidate has
been found in the initial data products. The 2.7'x2.7' sub-image covers 100% of
the XRT error circle. The typical 3-sigma upper limit has been about 19.6 mag.
The 8'x8' region for the list of sources generated on-board covers 100% of the
XRT error circle. The list of sources is typically complete to about 18 mag. No
correction has been made for the expected extinction corresponding to E(B-V) of
0.05.