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GCN Circular 4964

GRB060413: Swift/UVOT upper limits
2006-04-14T14:54:26Z (18 years ago)
Alexander Blustin at MSSL-UCL <>
A. J. Blustin (UCL-MSSL), C. Pagani (PSU), J. Kennea (PSU)
report on behalf of the Swift/UVOT team:

The Swift/UVOT began taking data on the field of GRB060413 at
2006-04-13T18:42:28, 124 s after the BAT trigger (Pagani et al.,
GCN 4957). No afterglow candidate was detected at the refined
XRT position (Pagani et al., GCN 4959) in summed images from
any of the filters down to the following three-sigma upper

Filter  T_range(s)  Exp(s) 3sig_UL

V       230-11744   1960   19.96
B       707-24977   2014   20.90
U       683-24287   2262   20.80
UVW1    660-23374   2118   20.14
UVM2    635-12648   1378   20.23
UVW2    735-7623    388    19.74
White   124-19078   1220   20.74

These upper limits are uncorrected for the estimated Galactic
reddening of E_{B-V} = 1.95 mag (Schlegel et al. 1998); we
estimate the V-band extinction A_v to be 6.24 magnitudes in this
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