GCN Circular 15780
Subject
GRB 140129B: Swift/UVOT Detection
Event
Date
2014-01-30T19:11:46Z (12 years ago)
From
Craig Swenson at PSU/Swift <cswenson@astro.psu.edu>
C. A. Swenson (PSU) and M. G. Bernardini (INAF-OAB) report on behalf
of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 140129B
356 s after the BAT trigger (Bernardini et al., GCN Circ. 15765).
A source consistent with the XRT position (Goad et al. GCN Circ. 15770)
is detected in the initial UVOT exposures.
The preliminary UVOT position is:
RA (J2000) = 21:47:01.66 = 326.75691 (deg.)
Dec (J2000) = +26:12:23.0 = 26.20638 (deg.)
with an estimated uncertainty of 0.50 arc sec. (radius, 90% confidence).
Preliminary detections 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 356 506 147 17.05 � 0.03
v 663 5031 72 18.04 � 0.20
b 588 608 20 17.90 � 0.20
u 562 582 20 17.24 � 0.17
w1 538 732 39 17.27 � 0.16
m2 513 1089 58 17.57 � 0.19
w2 638 1039 58 17.99 � 0.19
The clear detection in all UVOT filters indicate this burst is at a redshift
of z < ~1.5.
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).