GCN Circular 17062
Subject
GRB 141109A: AAO optical observations
Event
Date
2014-11-12T19:34:55Z (12 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), R. Inasaridze (AAO), A. Volnova (IKI), Molotov (KIAM),
A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration:
We observed the field of the Swift GRB 141109A (D'Avanzo et al., GCN
17037) with AS-32 (0.7m) telescope of Abastumani Observatory.
Observations were performed under mean seeing (FWHM) of 2.4". We
obtained several unfiltered images on Nov. 10 starting on (UT) 01:05:04.
At the position reported in (Covino, GCN 16932) we marginally
detected (S/N =2) the afterglow of GRB 141109A (Covino, GCN 16932; Xu
et al., GCN 17040; Graham et al., GCN 17041). Preliminary photometry is
following:
date UT start t-T0 Filter Exp. OT OT_err
(mid, days) (s)
2014-11-10 01:05:04 0.836 clear 37*120 21.7 0.4
The photometry is based on several SDSS-DR9 stars R magnitudes
transformed from SDSS-DR9 based on Lupton transformations:
SDSS-DR9 R
J093801.18-003731.5 17.6330
J093759.83-003741.8 17.2029
J093815.45-003332.9 18.2004