GCN Circular 12880
Subject
GRB 120119A: Swift/UVOT Observations
Event
Date
2012-01-19T20:29:33Z (14 years ago)
From
Margaret Chester at PSU <chester@astro.psu.edu>
M. M. Chester (PSU) and A. P. Beardmore (U Leicester)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 120119A
62 s after the BAT trigger (Beardmore et al., GCN Circ. 12859).
A source consistent with the XRT position (Beardmore et al., GCN Circ.
12876) is detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 08:00:06.93 = 120.02889 (deg.)
Dec (J2000) = -09:04:53.7 = -9.08159 (deg.)
with an estimated uncertainty of 0.59 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT
photometric system (Breeveld et al. 2011, AIP Conf. Proc. 1358, 373)
are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 62 211 147 19.5 +/- 0.1
white 62 1997 205 19.5 +/- 0.1
white 6130 30955 1112 21.9 +/- 0.4
v 1682 2048 58 >19.1
v 7810 12009 926 >20.8
b 1608 1973 58 19.4 +/- 0.3
b 5926 30829 1967 >22.0
u_FC 273 302 28 >18.7
u 273 1948 66 >19.3
u 5720 29917 1967 >21.7
w1 1731 1923 39 >19.1
w1 12921 25179 1511 >21.5
m2 1706 2073 58 >19.3
m2 12014 12914 885 >21.2
w2 1658 2022 58 >19.5
w2 6336 7804 242 >20.6
The magnitudes in the table are not corrected for the Galactic
extinction
due to the reddening of E(B-V) = 0.11 in the direction of the burst
(Schlegel et al. 1998).