TITLE:   GCN CIRCULAR
NUMBER:  24841
SUBJECT: GRB 190613B: Kitab observatory optical upper limit
DATE:    19/06/16 14:10:05 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

S. Belkin (IKI), A. Novichonok (KIAM), A. Zhornichenko (KIAM),  A. Pozanenko 
(IKI), E. Mazaeva  (IKI), A. Volnova (IKI), I. Molotov (KIAM), Sh. 
Ehgamberdiev (UBAI)  report on behalf of larger GRB IKI FuN collaboration:

We observed the field of the  GRB 190613B    (D'Aiet al., GCN  24807) with 
RC-36 0.36-m telescope of Kitab Observatory starting on June 13  (UT) 
22:26:32 in  Clear filter.    We do not detect the optical afterglow 
(D'Aiet al., GCN  24807; Marshall al., GCN  24817; Zheng al., GCN  24818; 
Ugarte Postigo al., GCN  24825; Hu al., GCN  24826).
Preliminary photometry of the field is following.

Date       UT start   t-T0       Filter Exp.   OT  Err.   UL(3sigma)
                       (mid, days)        (s)

2019-06-13  20:55:3    0.43001     CR     3600  n/d  n/d   20.0

The photometry is based on the nearby USNO-B1  (R2) stars.

USNO-B1.0_id R2
0853-0556521 16.14
0853-0556781 16.31