GCN Circular 18531
Subject
GRB 151029A: Swift/UVOT Detection
Date
2015-10-29T19:51:56Z (9 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates (IAA-CSIC/UCL-MSSL) and T. N. Ukwatta (LANL)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 151029A
92 s after the BAT trigger (Ukwatta et al., GCN Circ. 18522).
A source consistent with the XRT position (Beardmore et al., GCN Circ. 18526)
is detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 02:34:06.72 = 38.52799 (deg.)
Dec (J2000) = -35:23:08.6 = -35.38573 (deg.)
with an estimated uncertainty of 0.42 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 92 242 147 16.98 +/- 0.03
v 634 653 19 17.66 +/- 0.32
b 560 752 39 19.24 +/- 0.33
u 304 554 246 17.35 +/- 0.06
w1 683 703 19 >17.98
m2 658 850 39 >18.17
w2 609 802 39 >18.64
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.02 in the direction of the burst
(Schlegel et al. 1998).