[vsnet-grb-info 15249] GRB 140706A: Swift/UVOT Detection
GCN Circulars
gcncirc at capella2.gsfc.nasa.gov
Tue Jul 8 08:48:10 JST 2014
TITLE: GCN CIRCULAR
NUMBER: 16541
SUBJECT: GRB 140706A: Swift/UVOT Detection
DATE: 14/07/07 23:46:26 GMT
FROM: Mike Siegel at PSU/Swift MOC <siegel at swift.psu.edu>
M. H. Siegel (PSU) and F. E. Marshall (NASA/GSFC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140706A
82 s after the BAT trigger (Marshall et al., GCN Circ. 16531).
A fading source consistent with the XRT position
(Beardmore et al. GCN Circ. 16532)
is detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 03:17:10.39 = 49.29328 (deg.)
Dec (J2000) = -38:03:07.8 = -38.05218 (deg.)
with an estimated uncertainty of 0.45 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 (fc) 82 232 147 19.04 +/- 0.06
white 573 1541 244 19.76 +/- 0.16
v 624 1592 117 >18.8
b 550 1517 97 >19.2
u (fc) 294 544 246 19.02 +/- 0.11
u 624 1591 116 >19.6
w1 674 1638 94 >19.1
w2 775 1394 58 >20.1
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.02 in the direction of the burst
(Schlegel et al. 1998).
More information about the vsnet-grb-info
mailing list