TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4109
SUBJECT: GRB 051016A: Swift/UVOT upper limits
DATE:    05/10/17 19:06:25 GMT
FROM:    Alexander Blustin at MSSL-UCL  <ajb@mssl.ucl.ac.uk>

A. J. Blustin (UCL-MSSL), P. Boyd (GSFC), S. Oates (UCL-MSSL),
R. Fink (GSFC), M. Ajello (MPE), N. Gehrels (GSFC) on behalf of
the Swift/UVOT team report:

The Swift-UVOT began taking settled exposures of the field of
GRB 051016A 116 s after the BAT trigger (Boyd et al. GCN 4096).
No new source with respect to the DSS is detected within the
refined XRT error circle (Beardmore et al. GCN 4100) in summed
images down to the following 3-sigma magnitude upper limits:

Filter  T_range(sec)  Exp(sec)  3sigUL

V       116-41900     3345      20.3
B       483-40330     3693      21.7
U       428-47088     2542      20.7
W1      374-47026     3798      20.7
M2      320-46119     3798      21.0
W2      591-41238     3699      21.1

Where T_range is time post-trigger.