GCN Circular 18945
Subject
GRB 160127A: Swift/UVOT Detection
Event
Date
2016-01-27T20:48:49Z (10 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@swift.psu.edu>
M. H. Siegel (PSU) and Amaral-Rogers (U. Leicester)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160127A
82 s after the BAT trigger (Amaral-Rogers et al., GCN Circ. 18938).
A fading source consistent with the XRT position
(Evans et al. GCN Circ. 18940)
is detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 15:03:55.76 = 225.98234 (deg.)
Dec (J2000) = +00:04:22.5 = 0.07291 (deg.)
with an estimated uncertainty of 0.43 arc sec. (radius, 90% confidence).
Preliminary detections 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 17.59 +/- 0.04
white 574 2411 342 18.66 +/- 0.08
white 6837 7037 196 20.85 +/- 0.28
v 624 1942 156 18.46 +/- 0.19
b 550 1174 58 18.58 +/- 0.16
u (fc) 295 545 246 17.25 +/- 0.05
u 698 2362 174 18.31 +/- 0.13
u 6427 19117 1004 20.92 +/- 0.31
w1 674 1124 58 17.87 +/- 0.20
m2 824 1966 117 19.07 +/- 0.32
w2 600 1917 136 19.56 +/- 0.32
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.06 in the direction of the burst
(Schlegel et al. 1998).