GCN Circular 7611
Subject
GRB080413B
Event
Date
2008-04-13T20:38:00Z (18 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates and M. Stamatikos report on behalf of the Swift/UVOT team.
The Swift/UVOT began settled observations of the field of GRB 080413B 135s
after the BAT trigger (Stamatikos et al., GCN 7598). We detect the
afterglow
in the 7 UVOT filters at the position:
RA(J2000.0) = 21:44:34.65
DEC(J2000.0) = -19:58:52.40
with an estimated uncertainty of 0.5 arcsec (radius, 90% confidence).
This position is
consistent with the refined XRT position and the GROND optical position
(Kruehler et al., GCN 7599).
The magnitudes are reported below:
Filter T_Mid(s) Expo(s) Magnitude
-------------------------------------------------------
White 184 98 16.67 � 0.02
White 740 10 17.67 � 0.15
v 440 393 17.64 � 0.10
v 1183 393 18.64 � 0.22
b 727 10 18.82 � 0.71
u 796 19 17.67 � 0.27
w1 682 19 17.42 � 0.27
m2 810 19 18.07 � 0.47
w2 762 19 17.92 � 0.36
-------------------------------------------------------
The above magnitudes are not corrected for the Galactic extinction
corresponding to a
reddening of E_{B-V} = 0.04 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).