GCN Circular 23920
Subject
GRB 190219A: CrAO and AbAO optical upper limit
Date
2019-02-21T18:44:49Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
A. Volnova (IKI), S. Nazarov (CrAO), S. Schmalz (KIAM), R. Ya.
Inasaridze (AbAO), A. Pozanenko (IKI), S. Belkin (IKI), E. Mazaeva
(IKI), I. Molotov (KIAM) report on behalf of IKI-GRB-FuN collaboration:
We observed the field of GRB 190219A (Beardmore et al., GCN 23902) with
AZT-8 of CrAO, AS-32 (0.7m) telescope of Abastumani Observatory and
ORI-22 telescope of ISON-Castelgrande Observatory, first observation
starting on Feb. 19 (UT) 19:48:14. We do not detect any object within
enhanced XRT error circle (Beardmore et al., GCN 23907). In particular
we do not detect the afterglow candidate (Xu et al., GCN 23911).
Preliminary photometry of the field is following.
date UT start t-T0 Filter Exp. UL Obs./Tel.
(mid, d) (s) (3 sigma)
2019-02-19 20:14:14 0.02991 R 780 20.3 CrAO/AZT-8
2019-02-20 00:39:36 0.28998 R 95*60 20.8 AbAO/AS-32
The photometry is based on nearby USNO-B1.0 stars.