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GCN Circular 4894

GRB060319: Swift/UVOT upper limits
2006-03-19T08:34:34Z (18 years ago)
Alexander Blustin at MSSL-UCL <>
A. J. Blustin (UCL-MSSL), H. Ziaeepour (UCL-MSSL), F. E. Marshall
(NASA/GSFC) on behalf of the Swift/UVOT team

The Swift/UVOT began taking data on the field of GRB060319 at
00:58:02 on 2006-03-19, 139 s after the BAT trigger (Ziaeepour et
al., GCN 4885). In the initial 100 s White filter image no new
source is detected at the XRT position (Kennea et al., GCN 4886)
down to a 3-sigma magnitude upper limit of 20.6. No source is
detected in summed images from any of the filters down to the
following 3-sigma upper limits.

Filter  T_range(s) Exp(s) 3sigUL(mag)
V       500-2150   544    19.9
B       448-2102   128    20.2
U       423-2078   158    20.0
UVW1    400-2054   178    19.8
UVM2    245-2030   308    19.9
UVW2    476-2141   158    20.2
White   139-2116   276    20.7

These magnitudes are not corrected for Galactic extinction;
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