GCN Circular 8232
Subject
GRB 080915: Swift/UVOT Upper Limits
Event
Date
2008-09-15T13:39:55Z (18 years ago)
From
Alice Breeveld at MSSL-UCL <aad@mssl.ucl.ac.uk>
A. Breeveld (MSSL-UCL) and S.R. Oates (MSSL-UCL) report on behalf of the
Swift/UVOT team:
The Swift/UVOT observed the field of GRB 080915 (Oates et al., GCN Circ.
8227) with settled exposures starting 3872s after the trigger. We do not
find a source in any of the UVOT observations inside the XRT error
circle (Evans et al., GCN Circ. 8231). The 3-sigma upper limits in the
UVOT photometric system (Poole et al. 2008, MNRAS, 383, 627) for
detecting a source in the first white finding chart exposure and
subsequent co-added exposures are:
Filter T_start T_stop Exp Mag (3-sigma UL)
(s) (s) (s)
=========================================================
white (FC) 3872 3972 98.2 > 19.9
white 5004 5204 196.6 > 20.5
v 3979 4179 196.6 > 18.8
v 9633 10539 885.1 > 19.7
b 4799 4999 196.6 > 19.6
u 4594 4794 196.6 > 19.1
uvw1 4389 4589 196.6 > 19.3
uvm2 4184 11087 731.3 > 20.4
uvw2 5210 5329 117.3 > 19.6
The values quoted above are not corrected for the expected Galactic
extinction corresponding to a reddening of E(B-V) = 0.049 mag in the
direction of the burst (Schlegel et al. 1998).