GCN Circular 19134
Subject
GRB 160303A: Swift/UVOT Detection
Event
Date
2016-03-03T20:15:46Z (10 years ago)
From
Sam Emery at MSSL-UCL <samuel.emery.15@ucl.ac.uk>
S.W.K. Emery (UCL-MSSL) 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 160303A
109 s after the BAT trigger (Beardmore et al., GCN Circ. 19126).
We detect a fading source consistent with the XRT position
(Beardmore et al. GCN Circ. 19126) and the RATIR optical and NIR afterglow
detections (Butler et al. GCN Circ 19131)
in the initial UVOT u filter exposures.
Preliminary 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first
finding chart (FC) exposure and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 109 259 147 >21.9
u_FC 321 571 246 20.75
white 109 2061 450 >22.5
b 576 2037 136 >19.9
w1 700 2161 77 >20.5
m2 1426 1445 19 >19.5
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).