GCN Circular 19194
Subject
GRB 160313A: Swift/UVOT Upper Limits
Date
2016-03-15T16:18:15Z (9 years ago)
From
Marissa McCaule at PSU <marissamc@swift.psu.edu>
L. M. McCauley (PSU) and A. D'Ai (INAF-IASFPA) reports on behalf of the
Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 160313A
198 s after the BAT trigger (D'Ai et al., GCN Circ. 19171).
No optical afterglow consistent with the XRT position
(Goad et al. GCN Circ. 19174) 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 198 920 418 >20.77
white 198 5756 664 >21.01
v 355 6167 451 >19.78
b 454 5552 254 >20.24
u 430 6588 260 >19.44
uvw1 405 6577 451 >19.93
uvm2 4737 6372 393 >19.17
uvw2 4328 5962 393 >19.99
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.01 in the direction of the burst
(Schlegel et al. 1998).