GCN Circular 23919
Subject
GRB 190220B: Kitab Observatory optical upper limit
Date
2019-02-21T14:58:34Z (6 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Novichonok (KIAM), A. Pozanenko (IKI), E. Mazaeva
(IKI), A. Volnova (IKI), I. Molotov (KIAM) report on behalf of larger
GRB follow-up collaboration:
We observed the field of INTEGRAL GRB 190220B (Gotz et al., GCN 23915)
with RC-36 0.36-m telescope of Kitab Observatory starting on Feb. 20
(UT) 23:20:25 in Clear filter. We do not find any optical afterglow
candidate in the INTEGRAL GRB 190220B localization error circle (Gotz,
et al., GCN 23915) with is in agreement with earlier non detection by
BOOTES-4 (Hu et al., GCN 23916). Preliminary photometry of the field is
following.
Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)
2019-02-20 23:20:25 0.14972 CR 48*60 19.0 n/d n/d
The photometry is based on the nearby USNO-B1 (R2) stars.
.