GCN Circular 20045
Subject
GRB 161014A: Swift/UVOT Detection
Event
Date
2016-10-15T10:59:41Z (10 years ago)
From
Samantha Oates at MSSL <sro@mssl.ucl.ac.uk>
S. R. Oates (U. of Warwick) and J. L. Racusin (NASA/GSFC)
report on behalf of the Swift/UVOT team:
The Swift/UVOT began settled observations of the field of GRB 161014A
4 ks after the BAT trigger (Racusin et al., GCN Circ. 20035).
A source consistent with the optical position reported by MITSuME (Morita et al GCN Circ 20036)
and LCOGT-FTS (Guidorzi et al., GCN Circ. 20037) is detected in the
initial UVOT exposures. The lack of detection in the u and UV bands
is consistent with the redshift of 2.823 reported by GTC
(de Ugarte Postigo et al., GCN Circ. 20043).
The preliminary UVOT position is:
RA (J2000) = 22:10:35.46 = 332.64775 (deg.)
Dec (J2000) = 7:28:07.3 = 7.46869 (deg.)
with an estimated uncertainty of about 0.9 arc sec. (radius, 90% confidence).
Preliminary magnitudes using the UVOT photometric system
(Breeveld et al. 2011, AIP Conf. Proc. 1358, 373) are:
Filter T_start(s) T_stop(s) Exp(s) Mag
wh 4491 4690 197 20.4 +/- 0.3
wh 5929 6129 197 > 20.85
v 4903 5103 197 19.1 +/- 0.4
b 4286 5924 393 20.3 +/- 0.3
u 4081 23870 1630 > 20.9
w1 5314 23503 1968 > 21.0
m2 5109 18128 1163 > 20.8
w2 4698 6335 393 > 20.2
The magnitudes in the table are not corrected for the Galactic extinction
due to the reddening of E(B-V) = 0.08 in the direction of the burst
(Schlegel et al. 1998).