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GCN Circular 12880

Subject
GRB 120119A: Swift/UVOT Observations
Date
2012-01-19T20:29:33Z (12 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).
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