GCN Circular 16273
Subject
GRB 140515A: Swift/UVOT Upper Limits
Event
Date
2014-05-15T18:09:41Z (12 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates (IAA-CSIC,UCL-MSSL) and P. D'Avanzo (INAF-OAB)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140515A
79 s after the BAT trigger (D'Avanzo et al., GCN Circ. 16267).
No optical afterglow consistent with the XRT position
(Goad et al. GCN Circ. 16270) is detected in the initial UVOT exposures.
The lack of detection in all UVOT filters is consistent with a redshift of
6.32 (Chornock et al., GCN Circ. 16269).
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 79 229 147 >20.7
u_FC 293 542 246 >20.0
white 79 7407 638 >21.5
v 628 7818 471 >19.7
b 548 7202 456 >20.6
u 293 13671 1398 >20.9
w1 1618 12925 1140 >20.9
m2 6387 12019 1082 >20.6
w2 5977 7612 393 >20.5
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).