GCN Circular 5367
Subject
GRB 060729: Swift/UVOT Observations
Date
2006-07-29T23:33:34Z (18 years ago)
From
Stefan Immler at NASA/GSFC <immler@milkyway.gsfc.nasa.gov>
S. Immler (NASA/USRA/GSFC) reports on behalf of the Swift/UVOT team:
The Swift/UVOT began observing the field of GRB 060729 at
19:14:45 UT on 2006-07-29, 135 s after the BAT trigger (Grupe et al.,
GCN 5365). An optical counterpart was detected in the White
(160-650 nm) and V filters at a position of RA, Dec = 06:21:31.85,
-62:22:12.7 (J2000), located within the XRT error circle.
A White filter image taken 12 min later showed that the source
brightened by about 1 magnitude, while the source stayed constant
in images obtained in the V filter within the same period.
The photometry results are given for the UVOT filters below:
Filter T_start(s) Exposure(s) Mag
White 135 100 17.75
White 860 100 16.65
V 241 396 17.30
V 966 400 17.35
Statistical and systematic errors are 0.1 mag each.
The values quoted above are not corrected for the expected
Galactic extinction of E_{B-V}=0.054 (Schlegel et al. 1998).
More UVOT data are expected after the next Malindi contact
(2006-07-30 01:27 UT).