GCN Circular 7607
Subject
GRB080413A: Swift/UVOT observations
Event
Date
2008-04-13T17:49:17Z (18 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates and F. E. Marshall report on behalf of the Swift/UVOT team.
The Swift/UVOT observed the field of GRB 080413A starting at 77s after
the BAT
trigger (Beardmore et al., GCN 7594). We detect the afterglow in
white,v,b and
u filters at the position:
RA(J2000.0) = 19:09:11.76
DEC(J2000.0) = -27:40:40.27
with an estimated uncertainty of 0.5 arcsec (radius, 90% confidence).
This position is
consistent with the enhanced XRT position and the position reported by
ROSTE-III
(Rykoff et al., GCN 7593).
The magnitudes and 3 sigma upper limits are reported below:
Filter T_Mid(s) Expo(s) Magnitude/3sigUL
-----------------------------------------------------
White 126 98 15.37 +/- 0.01
White 5478 197 19.74 +/- 0.17
v 268 169 15.08 +/- 0.03
v 5888 197 19.16 +/- 0.51
b 5273 197 19.33 +/- 0.21
u 5068 197 19.05 +/- 0.22
w1 4863 197 >19.55
m2 4658 197 >19.48
w2 5684 197 >19.57
-----------------------------------------------------
The above magnitudes are not corrected for the Galactic extinction
corresponding to a
reddening of E_{B-V} = 0.16 mag (Schlegel et al., 1998, ApJS, 500, 525).
The photometry
is on the UVOT flight system described in Poole et al. (2008,MNRAS,383,627).