GCN Circular 28020
Subject
GRB 200623A: AbAO afterglow candidate within XRT #2
Event
Date
2020-06-23T23:00:03Z (5 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), R. Ya. Inasaridze (AbAO), V.R.
Ayvazian (AbAO), G. V. Kapanadze (AbAO), E. Mazaeva (IKI), A.
Volnova (IKI), I. Molotov (KIAM) report on behalf of GRB IKI FuN:
We observed the field of Swift/BAT-GUANO position (DeLaunay et al., GCNs
28013, 28016) of GRB 200623A (Fermi GBM team, GCN 28011; Veres et al.,
GCN 28019) with AS-32 (0.7m) telescope of Abastumani Observatory
starting on 2020-06-23 (UT) 18:46:58. We detected only one object
within the XRT #2 source localization
(https://www.swift.ac.uk/ToO_GRBs/00021005/). The source is not
presented in SDSS DR12. We suggest the object could be afterglow of GRB
200623A. However at this time we cannot confirm variability of the
object. Preliminary photometry of the object is following.
Date UT start t-T0 Filter Exp. OT Err. UL
(mid, days) (s)
2020-06-23 18:46:58 0.66456 R 56*60 21.88 0.17 22.6
No new objects were found in the localization of the XRT # 3 source.
The photometry is based on nearby USNO-B1.0 stars
UUSNO-B1.0_id R2
1434-0283797 15.99
1434-0253851 17.48