GCN Circular 19372
Subject
GRB 160501A: Swift/UVOT Upper Limits
Date
2016-05-01T20:00:06Z (8 years ago)
From
Alice Breeveld at MSSL-UCL <a.breeveld@ucl.ac.uk>
A. A. Breeveld (UCL-MSSL) and J. R. Cummings (NASA/UMBC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160501A
136s after the BAT trigger (Cummings et al., GCN Circ. 19365).
No optical afterglow consistent with the XRT position (Evans et al. GCN
Circ. 19369) is detected in the initial UVOT 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 136 286 147 >20.3
u_FC 295 544 246 >19.7
white 575 1543 245 >21.1
v 625 1594 117 >18.9
b 551 1518 97 >19.9
w1 674 1643 117 >19.2
m2 649 1618 117 >19.7
w2 600 1569 117 >19.2
The magnitudes in the table are not corrected for the Galactic
extinction due to the reddening of E(B-V) = 0.18 in the direction of the
burst (Schlegel et al. 1998).