GCN Circular 23654
Subject
GRB 190109B: Mondy optical upper limit
Event
Date
2019-01-09T15:29:40Z (7 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Belkin (IKI), E. Klunko (ISTP), A. Pozanenko (IKI), E. Mazaeva (IKI),
A. Volnova (IKI) report on behalf of IKI-FuN:
We observed the field of the GRB 190109B (Sbarufatti et al., GCN 23648)
with AZT-33IK telescope of Sayan observatory (Mondy). We obtained
several images in R-filter starting on Jan. 09 (UT) 12:17:03, i.e. 21
minutes after the burst trigger. We do not detect any object within
enhanced Swift-XRT position (Beardmore et al., GCN 23652). Preliminary
photometry of the field is following.
Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)
2019-01-09 12:17:03 0.02463 R 1900 n/d n/d 22.6
The photometry is based on several nearby USNO-B1.0 stars.
[GCN OPS NOTE(09jan19): Using information from Circ# 23657, the SUBJECT-line
and first sentence has been changed from 190109A to 190109B.]