GCN Circular 27240
Subject
GRB 200224A: Mondy optical upper limit
Event
Date
2020-02-27T16:28:46Z (6 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), A. Pozanenko (IKI), E. Klunko (ISTP), E. Mazaeva (IKI),
A. Volnova (IKI) report on behalf of IKI-GRB-FuN:
We observed the field of GRB 200224A (Ukwatta et al., GCN 27173; Fermi
GBM team GCN 27174) with AZT-33IK telescope of Sayan observatory (Mondy)
starting on Feb. 26 (UT) 17:24:49. We did not detect the optical
afterglow (Sota et al., GCN 27176; Stecklum et al., GCN 27177; Marshall
et al., GCN 27182; Becerra et al., GCN 27182; Fernandez et al., GCN
27222). Preliminary photometry of the field is following.
Date UT start, t-T0 Filter Exp. OT UL(3sigma)
(mid, days) (s)
2020-02-26 17:24:49 2.60348 R 29*120 n/d 22.6
Photometry is based on the USNO-B1.0 nearby stars.