GCN Circular 21237
Subject
GRB 170607A: ISON/Terskol optical observations
Event
Date
2017-06-09T18:33:32Z (8 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), A. Pozanenko (IKI), V. Agletdinov (KIAM), E. Mazaeva
(IKI), A. Mokhnatkin (KIAM), I. Molotov (KIAM) report on behalf of
larger GRB follow-up collaboration:
We observed the field of GRB 170607A (D���Ai et al., GCN 21214) with K-800
(0.8m) telescope of ISON/Terskol observatory starting on June, 08
(UT) 23:23:04, about 1 day after the burst onset. We obtained several
unfiltered images of 20 s exposure. The optical afterglow (D���Ai et al.,
GCN 21214; Heintz et al., GCN 21217; Lipunov et al., GCN 21220) is
still bright and clearly visible in a combined image. Preliminary
photometry of the afterglow is following
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2017-06-08 22:21:31 1.01959 CR 128*20 18.50 0.28 18.90
Photometry is based on nearby SDSS DR9 stars
SDSS id R_Lupton
J002930.50+091415.3 16.314
J002920.28+091527.1 15.963
J002925.73+091637.7 14.803