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GCN Circular 4342

GRB 051211A: Swift/UVOT upper limits
2005-12-12T15:48:34Z (18 years ago)
Alexander Blustin at MSSL-UCL <>
A. J. Blustin (UCL-MSSL), G. Cusumano (INAF-IASF), J. Greiner (MPE),
D. Hinshaw (GSFC-SPSYS), N. Gehrels (GSFC) on behalf of the
Swift/UVOT team

The Swift/UVOT began observing the field of GRB 051211a at 15:50:04 UT
on 2005-12-11, 13 hours after the HETE trigger (Atteia et al., GCN 4324).
No potential optical/UV counterpart was found in co-added images in any
of the filters, within the reported 80 arcsec radius (90% confidence)
HETE error circle, down to the following 5-sigma magnitude upper limits 
(not corrected for extinction).

Filter   T_range(hours)  Exp(s)  5sigUL(mag)

V        14.9-15.1       886      19.4
B        13.5-13.7       738      20.2
U        13.3-16.7       1469     20.3
W1       13.0-16.5       1800     20.0
M2       11.9-15.3       1502     20.1
W2       14.6-14.9       900      20.1
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