GCN Circular 16446
Subject
GRB 140622A: Swift/UVOT Upper Limits
Event
Date
2014-06-23T19:35:49Z (12 years ago)
From
Frank Marshall at GSFC <femarsha@khamseen.gsfc.nasa.gov>
F. E. Marshall (NASA/GSFC) and V. D'Elia (ASDC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140622A
97 s after the BAT trigger (D'Elia et al. GCN Circ. 16433).
No optical afterglow consistent with the XRT position
(Osborne et al. GCN Circ. 16434) 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 97 246 147 >21.2
u_FC 309 559 246 >20.0
white 97 1358 373 >21.2
v 639 1407 97 >19.6
b 564 1334 78 >20.1
u 309 1309 304 >20.2
w1 688 1285 58 >19.6
m2 663 1260 78 >20.6
w2 614 1383 97 >20.2
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.07 in the direction of the burst
(Schlegel et al. 1998).