GCN Circular 7339
Subject
UVOT analysis for GRB080229
Event
Date
2008-03-01T00:34:09Z (18 years ago)
From
Paul Kuin at MSSL <npkuin@googlemail.com>
N.P.M. Kuin (MSSL/UCL) and J. K. Cannizzo (NASA/UMBC) report on
behalf of the Swift-UVOT team:
The Swift/UVOT observed the field of GRB 080229 (trigger #304379),
Canizzo et al. GCN CIRC. 7335) starting 2008:02:29 at 17:06:22 UT
with a 9.4 s setling image followed at 17:06:41 UT with a finding
chart. No afterglow is detected at the position of the enhanced
XRT position in the finding chart, nor in the three subsequent
exposures.
The source is near a bright star and may be affected by it.
Therefore a small aperture was used and the background was determined
for a region at equal distance to the nearby star.
The following 3-sigma upper limits (in the UVOT photometric system,
Breeveld et al., GCN Circ. 6614) were determined at the XRT
position (RA=15:12:52.53, DEC= -14:42:19.3, J2000):
Filter Tstart(s) Tstop(s) Exp(s) Mag (3-sigma Upper Limits)
wh 101 200 99.8 > 20.9
v 208 608 400.0 > 19.9
wh 856 956 99.8 > 20.9
v 962 1362 400.0 > 19.9
The values quoted above are not corrected for the expected Galactic
extinction corresponding to a reddening of E_{B-V} = 0.15 mag in the
direction of the burst (Schlegel et al. 1998).