GCN Circular 17964
Subject
GRB 150626A: Swift/UVOT Upper Limits
Date
2015-06-26T13:57:17Z (10 years ago)
From
Massimiliano de Pasquale at IASF-Palermo <m.depasquale@ucl.ac.uk>
M. De Pasquale (UCL-MSSL) and T. Roegiers (PSU)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 150626A
98 s after the BAT trigger (Roegiers et al., GCN Circ. 17960).
No optical afterglow consistent with the XRT position (Evans
GCN Circ. 17961) 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) exposures and subsequent exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white_FC 98 248 147 >20.4
u_FC 311 561 246 >19.6
white 98 1540 392 >21.1
u 311 1490 324 >19.8
v 641 1590 95 >18.8
b 566 1514 97 >19.7
uw1 690 1465 78 >18.8
um2 665 1440 97 >18.6
uw2 616 1390 97 >19.0
The magnitudes in the table are not corrected for the substantial
Galactic extinction due to the reddening of E(B-V) = 0.37 in the
direction of the burst (Schlegel et al. 1998).