GCN Circular 6632
Subject
GRB 070714B: Swift/UVOT Upper Limits
Event
Date
2007-07-16T19:59:10Z (18 years ago)
From
Wayne Landsman at GSFC/SSAI <landsman@milkyway.gsfc.nasa.gov>
W. Landsman (NASA/GSFC) and J. Racusin (PSU) report on behalf of the
Swift/UVOT team:
The Swift/UVOT observed the field of GRB 070714B starting 70 s after the
BAT trigger (Racusin et al. GCN Circ.6620). We do not find any source,
in any of the UVOT observations, inside the refined XRT error circle
(Racusin et al., GCN Circ. 6627), or at the location of the Liverpool
source (Melandri et al., GCN Circ. 6621).
The 3-sigma upper limits for detecting a source inside the refined XRT
error circle are:
Filter T_start T_end Exp(s) Mag (3-sigma upper limit)
White 70 170 98.2 > 20.4
v 177 577 393.4 > 19.6
b 657 1637 58.1 > 19.2
u 632 1766 89.2 > 19.2
uvw1 607 1750 97.3 > 19.1
uvw2 687 1676 77.8 > 19.2
The values quoted above are not corrected for the expected Galactic
extinction
corresponding to a reddening of E_{B-V} = 0.14 mag in the direction of the
burst (Schlegel et al. 1998).