GCN Circular 6519
Subject
GRB 070612B: Swift/UVOT upper limits
Date
2007-06-12T15:15:50Z (17 years ago)
From
Wayne Landsman at GSFC/SSAI <landsman@milkyway.gsfc.nasa.gov>
W. Landsman (NASA/GSFC) and D. Grupe (PSU) report on behalf of the
Swift/UVOT team.
The Swift/UVOT observed the field of GRB 070612B starting 3256 s after
the BAT trigger (Grupe et al., GCN Circ. 6511). The UVOT observations
were delayed due to a Earth-limb constraint.
We do not find any source in any of the UVOT observations inside the
refined XRT error circle (Grupe et al., GCN Circ. 6514). The 3-sigma
upper limits for detecting a source in the first finding chart (FC)
exposure and co-added frames are:
Filter T_start(s) T_stop(s) Exp(s) Mag (3-sigma UL)
Wh (FC) 3256 3356 98 >20.3
Wh 3256 9882 1201 >21.7
V 3238 11624 1113 >20.0
B 4180 5813 393 >20.4
U 3975 5608 393 >20.1
UVW1 3772 5404 393 >20.1
UVM2 3567 5199 393 >20.0
UVW2 4590 10888 1082 >20.9