GCN Circular 18094
Subject
GRB 150728A: AAO optical observations
Date
2015-07-29T18:30:31Z (9 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
E. Mazaeva (IKI), R. Inasaridze (AAO), Sh. Makandarashvili (AAO), A.
Volnova (IKI), I. Molotov (KIAM), A. Pozanenko (IKI) report on behalf of
larger GRB follow-up collaboration:
We observed the field of the Swift GRB 150728A (Krimm et al. GCN 18087)
with AS-32 (0.7m) telescope of Abastumani Observatory starting on Jul.
28 (UT) 19:32:14. Within the enhanced XRT error circle (Beardmore et
al. GCN 18088) we detected the object coinciding with the object found
by FTN (Dichiara et al. GCN 18090). A photometry of the object is following
Date UT start t-T0 Filter Exp. OT
(mid, days) (s)
2015-07-28 19:32:14 0.30491 None 28*120 20.6+/-0.25
The photometry is based on nearby USNO-B1.0 stars
USNO-B.1_id R2
1239-0338943 17.06
1239-0338998 16.69
The photometry could be biased by nearby star. Presently we cannot say
nothing about variability of the object and more observation is
necessary to confirm/reject the object as afterglow of GRB 150728A.