GCN Circular 24754
Subject
GRB 190604B: Kitab observatory optical upper limit
Date
2019-06-05T19:24:37Z (5 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), Sh. Ehgamberdiev (UBAI)
report on behalf of larger IKI GRB FuN collaboration:
We observed the field of the Swift GRB 190604B (Page et al., GCN 24742)
with RC-36 0.36-m telescope of Kitab Observatory starting on June 04
(UT) 22:26:32 in Clear filter. We do not find any optical source
within enhanced Swift-XRT position (Evans et al., GCN 24746). The
non-detection is consistent with BOOTES-3 results (Hu et al., GCN 24750).
Preliminary photometry of the field is following.
Date UT start t-T0 Filter Exp. OT Err. UL(3sigma)
(mid, days) (s)
2019-06-04 22:26:32 0.32068 CR 21*60 n/d n/d 18.6
The photometry is based on the nearby USNO-B1 (R2) stars.