GCN Circular 3992
Subject
GRB 050915B: Swift/UVOT Upper Limits
Date
2005-09-16T20:19:47Z (19 years ago)
From
Stephen Holland at USRA/NASA/GSFC/SSC <sholland@milkyway.gsfc.nasa.gov>
GRB 050915B: Swift/UVOT Upper Limits
S. T. Holland (GSFC/USRA), A. Falcone (PSU), M. Carter (UCL/MSSL),
P. Smith (UCL/MSSL), and N. Gehrels (GSFC) report on behalf of the
Swift/UVOT team:
The Swift/UVOT began observing the field of GRB 050915B 121
seconds after the BAT trigger (Falcone et al. GCN 3987). No new source
is detected at the position of the XRT error circle (Falcone et
al. GCN 3989) in the initial 100 second V-band image down to a 5-sigma
upper limit of 17.5, 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 133 - 25,406 1824 19.2
B 279 - 35,461 2983 20.4
U 265 - 31,288 2381 20.2
UVW1 251 - 30,503 2972 21.0
UVM2 237 - 29,595 3006 20.7
UVW2 294 - 35,995 2609 20.8
The magnitudes are uncorrected for extinction.