GCN Circular 19862
Subject
GRB 160824A: ISON/Terskol optical observations
Event
Date
2016-08-25T18:20:16Z (10 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), A. Mokhnatkin (KIAM), A. Volnova (IKI), Molotov (KIAM),
A. Pozanenko (IKI) report on behalf of larger GRB follow-up collaboration
We observed the field of GRB 160824A (Evans et al., GCN 19855) with K-800
(0.8m f/2.9) telescope of ISON/Terskol observatory. We obtained several
unfiltered images starting on August 24 (UT) 23:58:36. We detected
optical source in coordinates
(J2000) 05:20:21.18 +40:01:43.5 with uncertainty of 1 arcsec in both
coordinates. This is 2.6 arcsec apart of the center of the enhanced XRT
error circle (Goad et al., GCN 19857). At this time we cannot say nothing
about variability of the object. It is not clear whether our source is the
same as the source reported by Marshall et al. (GCN 19860). Preliminary
photometry of a combined image is following
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2016-08-24 23:58:36 0.02758 CR 400 20.6 0.3 20.9
Photometry is based on nearby USNO-B1.0 stars
USNO-B1.0_id R2
1300-0122742 18.17
1300-0122665 18.04
1300-0122653 18.66
1300-0122680 17.00
1300-0122864 17.60
1299-0128308 18.00
1300-0122784 17.56