GCN Circular 18160
Subject
GRB 150817A: AAO optical observations
Date
2015-08-18T19:09:15Z (9 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), R. Inasaridze (AAO), V. Ayvazian (AAO), I. Molotov
(KIAM), A. Pozanenko (IKI) report on behalf of larger GRB follow-up
collaboration:
We observed the field of the Swift GRB 150817A (D���Elia et al., GCN
18143) with AS-32 (0.7m) telescope of Abastumani Observatory starting on
Aug. 17 (UT) 17:00:31. Within the enhanced XRT error circle (Osborne et
al., GCN 18146) we do not detect the optical afterglow (Butler et al.,
GCN 18145; Cenko et al., GCN 18153). In particular the magnitude of the
first object (Butler et al., GCN 18144) is 21.6 +/- 0.2. Upper limit of
the object is following
Date UT start t-T0 Filter Exp. UL(3 sigam)
(mid, days) (s)
2015-08-17 17:00:31 0.64432 None 24*120 22.4
The photometry is based on nearby USNO-B1.0 stars
USNO-B.1_id R2
0779-0405699 16.12
0779-0405721 16.40
0779-0405742 16.47
0779-0405723 16.94
0779-0405664 17.60