GCN Circular 6215
Subject
GRB070318: Swift UVOT continuing observations
Event
Date
2007-03-18T23:35:03Z (19 years ago)
From
Mat Page at MSSL/Swift <mjp@mssl.ucl.ac.uk>
M. Page (MSSL-UCL), M. Chester (PSU), J. R. Cummings (NASA/UMBC) report
on behalf of the Swift/UVOT team:
The Swift/UVOT began taking data in the field of GRB070318 88s after
the BAT trigger (Cummings et al., GCN 6210, Marshall et al., GCN 6213).
The afterglow is detected in all UVOT filters. The photometry results
are given for the 7 UVOT filters below. The first White exposure was
affected by the star tracker loss of lock, so results from this exposure
are not reported below.
Filter T+(s) Exp(s) Mag
White 706 10 15.53 +/- 0.08
White 6364 197 18.14 +/- 0.07
V 214 400 15.43 +/- 0.02
B 692 10 16.25 +/- 0.12
B 6159 197 18.91 +/- 0.13
U 667 19 15.89 +/- 0.09
U 5955 197 18.23 +/- 0.11
UVW1 644 19 16.89 +/- 0.18
UVW1 5750 197 19.62 +/- 0.30
UVM2 619 19 17.97 +/- 0.37
UVM2 5545 197 > 19.87 (3-sigma UL)
UVW2 870 19 18.03 +/- 0.30
UVW2 6569 197 > 20.37 (3-sigma UL)
T+ is the start time of the exposure since the BAT trigger. These
magnitudes are not corrected for the expected extinction of
E(B-V)=0.017.