GCN Circular 10274
Subject
GRB091208A: Swift/UVOT refined analysis
Date
2009-12-09T13:43:27Z (15 years ago)
From
Massimiliano de Pasquale at MSSL-UCL <mdp@mssl.ucl.ac.uk>
M. De Pasquale (MSSL/UCL) and E. Hoversten (PSU) report on the behalf of
the Swift team:
Swift/UVOT observed the field of GRB091208A from 4.32 ks to 4.33 ks after
the BAT trigger in the v filter and then from 26.01 to 26.71 ks after the
trigger in u, v and white filters. No new source is detected in the BAT
error circle (Barthelmy et al., GCN Circ. 10264). We caution though that
a small fraction of BAT error circle is not covered by UVOT exposures.
3 sigma upper limits on magnitudes are as follows:
Filter T_start(s) T_stop(s) Exp(s) Mag
v 4318 4328 10 >17.4
v 26513 26717 200 >19.4
wh 26261 26507 243 >21.1
u 26008 26255 243 >20.1
The values quoted above are on the UVOT Photometric System
(Poole et al., 2008, MNRAS 383,627). They are not corrected for
the expected strong Galactic extinction, corresponding to a reddening
of E(B-V)=1.6.