[vsnet-grb-info 2250] GRB 051006: Swift/UVOT Upper Limits

[GCN Circulars]

TITLE:   GCN GRB OBSERVATION REPORT
NUMBER:  4089
SUBJECT: GRB 051006: Swift/UVOT Upper Limits
DATE:    05/10/12 14:23:12 GMT
FROM:    Stephen Holland at USRA/NASA/GSFC/SSC  <sholland at milkyway.gsfc.nasa.gov>

GRB 051006: Swift/UVOT Upper Limits

S. T. Holland (GSFC/USRA), J. Norris (GSFC), J. Greiner (MPE),
D. Hinshaw (GSFC-SPSYS), and N. Gehrels (GSFC) report on behalf
of the Swift/UVOT team:

       The Swift/UVOT began observing the field of GRB 051006 107
seconds after the BAT trigger (Norris et al. GCN 4061).  No new source
is detected at the position of the XRT error circle (Capalbi et
al. GCN 4066) in the initial 200 second V-band image down to a 5-sigma
upper limit of 18.3, or in summed exposures with any of the filters
down to the following 5-sigma magnitude upper limits.

Filter  T_range (s)     Exp (s)  5sig UL
V       107 - 98,547    12,033     20.5
B       474 - 68,573     4,111     20.9
U       420 - 64,478     3,846     20.4
UVW1    366 - 63,741     4,598     21.0
UVM2    311 - 73,819     4,179     21.3
UVW2    582 - 69,481     5,448     21.6
WHITE   527 -    577        50     18.5

These magnitudes have not been corrected for extinction.