[vsnet-grb-info 15180] GRB 140628A: Swift/UVOT Detection
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Sun Jun 29 06:52:17 JST 2014
TITLE: GCN CIRCULAR
NUMBER: 16472
SUBJECT: GRB 140628A: Swift/UVOT Detection
DATE: 14/06/28 21:52:10 GMT
FROM: Paul Kuin at MSSL <npkuin at gmail.com>
N. P. M. Kuin (UCL-MSSL) and E. Sonbas (NASA/GSFC/Adiyaman Univ.)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140628A
278 s after the BAT trigger (Sonbas et al., GCN Circ. 16467). A source
consistent with the XRT position (D'Avanzo et al. GCN Circ. 16470)
is detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 02:42:39.88 = 40.66617 (deg.)
Dec (J2000) = -00:23:05.7 = -0.38491 (deg.)
with an estimated uncertainty of 0.46 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) for the early exposures
are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 278 327 48 17.43 +/- 0.08
white 3593 4974 300 >21.0
v 3749 3949 197 19.08 +/- 0.28
b 4569 4769 197 >20.2
u 4364 4564 197 >19.5
w1 4159 4359 197 >19.8
m2 3954 4154 197 >21.2
w2 9366 10266 886 >21.1
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.03 in the direction of the burst
(Schlegel et al. 1998).
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