GCN Circular 6712
Subject
Swift/UVOT observations of GRB070805
Date
2007-08-06T12:06:28Z (17 years ago)
From
Patricia Schady at MSSL/Swift <ps@mssl.ucl.ac.uk>
P. Schady and A.M. Parsons (GSFC) report on behalf of the Swift UVOT team
The Swift/UVOT observed the field of GRB070805 (trigger=287088) starting
33 minutes after the BAT trigger (Parsons et al. 2007, GCN Circ.6708). We
do not find any new source in the UVOT observations within the BAT error
circle or in the whole of the UVOT field of view, which we note is a very
crowded field.
The 5-sigma upper limits in the co-added frames are listed below:
Filter Tmid Exposure Magnitude
(s) (s) (5-sigma UL)
white 3267 333 > 20.2
v 2825 274 > 18.5
b 3441 274 > 19.5
u 3287 274 > 19.2
uvw1 3133 274 > 19.0
uvm2 2979 274 > 18.8
uvw2 3384 452 > 19.4
where Tmid is the weighted mean team of the coadded exposure. The values
quoted above are not corrected for the expected Galactic extinction
corresponding to a reddening of E(B-V) = 0.202 mag in the direction of the
burst (Schlegel et al. 1998).