GCN Circular 17909
Subject
GRB 150607A: Swift/UVOT Detection
Date
2015-06-08T00:28:17Z (10 years ago)
From
Lea Hagen at PSU <lea.zernow.hagen@gmail.com>
L. M. Z. Hagen (PSU) and V. D'Elia (ASDC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 150607A
137 s after the BAT trigger (D'Elia et al., GCN Circ. 17904). A source
consistent with the XRT position (Osborne et al. GCN Circ. 17905) is
detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 09:19:57.20 = 139.98833 (deg.)
Dec (J2000) = +68:26:10.3 = 68.43619 (deg.)
with an estimated uncertainty of 0.44 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 early
exposures are:
Filter T_start(s) T_stop(s) Exp(s) Mag
white 137 286 146 18.10 +/- 0.07
white 628 1204 205 20.04 +/- 0.31
white 1358 7668 412 >20.55
v 118 128 9 16.71 +/- 0.35
v 678 7955 446 >19.02
b 604 7463 367 >19.65
u 348 598 245 18.88 +/- 0.27
u 753 7258 352 >19.37
uvw1 728 7053 352 >19.60
uvm2 1084 6848 313 >19.74
uvw2 654 7874 568 >20.30
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).