GCN Circular 21351
Subject
GRB 170714A: Swift/UVOT Observations
Event
Date
2017-07-17T19:28:04Z (9 years ago)
From
Frank Marshall at GSFC <femarsha@khamseen.gsfc.nasa.gov>
F. E. Marshall (NASA/GSFC) and A. D'Ai (INAF-IASFPA)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 170714A
384 s after the BAT trigger (D'Ai et al., GCN Circ. 21340).
There is weak evidence for a fading source consistent with the
position of the z-band afterglow candidate reported by
de Ugarte Postigo et al. (GCN Circ. 21346).
Preliminary detections and 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the initial exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
v 384 1695 175 >18.6
b 496 1644 155 20.0 +/- 0.33
b 5390 24672 1011 >20.3
u 471 1619 284 20.1 +/- 0.35
u 5185 30412 2351 20.4 +/- 0.18
u 81432 92912 1509 >20.7
w1 446 1594 136 >21.0
m2 6006 29000 2637 >20.9
w2 5596 34449 3032 >22.0
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.03 in the direction of the burst
(Schlegel et al. 1998).
[GCN OPS NOTE(17jul17): Per author's request, please see GCN Circ 21353
for corrections to the above table.]