GCN Circular 7592
Subject
GRB 080411: Swift/UVOT refined analysis
Event
Date
2008-04-12T15:22:49Z (18 years ago)
From
Andy Beardmore at U Leicester <apb@star.le.ac.uk>
S. R. Oates and F. Marshall report on behalf of the Swift/UVOT team.
The Swift/UVOT observed the field of GRB 080411 starting at 4202s
after the BAT trigger (Marshall et al., GCN 7584). We detect the
afterglow in white, v, b, u and uvw2 filters at the position:
RA(J2000.0) = 02:31:55.19
DEC(J2000.0) = -71:18:07.30
with an etimated uncertainty of 0.5 arcsec (radius, 90% confidence).
This position is consistent with the optical afterglow position
reported by GROND (Kruehler et al., GCN 7586). The UVOT did not
perform observations in uvw1 and uvm2 filters. The following
magnitudes were obtained:
Filter T_Mid(s) Expo(s) Magnitude
-----------------------------------------------------
White 4251 98 17.01 +/- 0.03
White 22869 295 18.09 +/- 0.03
v 16808 177 18.05 +/- 0.12
b 4615 197 17.43 +/- 0.05
b 21653 295 18.39 +/- 0.09
u 4410 197 16.46 +/- 0.04
uvw2 16260 886 18.41 +/- 0.07
-----------------------------------------------------
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).