GCN Circular 16219
Subject
GRB 140506A: Swift/UVOT Detection
Event
Date
2014-05-07T17:00:49Z (12 years ago)
From
Mike Siegel at PSU/Swift MOC <siegel@swift.psu.edu>
M. H. Siegel (PSU) and B. P. Gompertz (U Leicester)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140506A
108 s after the BAT trigger (Gompertz et al., GCN Circ. 16214).
A source consistent with the XRT position
(Osborne et al. GCN Circ. 16215)
is detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 18:27:06.04 = 276.77516 (deg.)
Dec (J2000) = -55:38:08.7 = -55.63575 (deg.)
with an estimated uncertainty of 0.43 arc sec. (radius, 90% confidence).
Preliminary detections and 3-sigma upper limits using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) for the first and second
orbits are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white (fc) 108 257 147 17.19+-0.03
white 108 1545 390 17.82+-0.05
white 6078 6278 196 20.07+-0.14
white 11748 12655 885 21.52+-0.26
v 650 1576 98 >18.87
v 5053 6688 393 19.82+-0.32
b 576 1520 97 19.40+-0.30
b 5873 7334 221 >20.57
u (fc) 320 570 245 17.34+-0.07
u 320 1496 323 17.50+-0.07
u 5668 7303 393 20.04+-0.34
uvw1 700 1471 77 18.60+-0.29
uvw1 5463 7098 393 >20.29
uvm2 675 1446 97 >18.96
uvm2 5257 6893 393 >20.17
uvw2 626 1570 116 >19.41
uvw2 6284 6484 196 >19.97
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.09 in the direction of the burst
(Schlegel et al. 1998).