GCN Circular 5993
Subject
GRB 070103: Swift/UVOT Upper limits
Date
2007-01-04T15:42:47Z (17 years ago)
From
Stephen Holland at USRA/NASA/GSFC/SSC <sholland@milkyway.gsfc.nasa.gov>
S. T. Holland (CRESST/GSFC/USRA) and T. Sakamoto (NASA/ORAU)
report on the behalf of the Swift UVOT team:
The Swift/UVOT observed the field of GRB 070103 starting 55 s
after the BAT trigger (Sakamoto et al. 2007, GCN Circ. 5988). We do
not find any source, in any of the UVOT observations, inside the
refined XRT error circle (Mangano et al., 2007 GCN Circ. 5992).
The 3-sigma upper limits for detecting a source anywhere inside
the XRT error circle in the V-band settling image, the finding-chart
exposures, and the co-added frames are:
Filter T_start T_stop Exp(s) Mag (3-sigma upper limit)
-----------------------------------------------------------------
V settling 55 65 9 16.5
V finding 180 580 393 19.6
V finding 857 1257 393 19.6
White finding 75 175 98 19.8
V 55 23,730 2881 20.8
B 5652 30,281 1235 21.3
U 634 36,065 3344 21.6
UVW1 610 35,291 3778 21.5
UVM2 586 34,384 2930 21.4
UVW2 686 22,816 1318 21.0
White 75 6056 411 20.7
-----------------------------------------------------------------
The values quoted above are not corrected for the expected Galactic
extinction corresponding to a reddening of E_{B-V} = 0.07 mag towards
the direction of the burst (Schlegel et al. 1998).