TITLE:   GCN CIRCULAR
NUMBER:  27983
SUBJECT: GRB 200613A: continued Kitab optical observations
DATE:    20/06/18 22:04:59 GMT
FROM:    Alexei Pozanenko at IKI, Moscow  <apozanen@iki.rssi.ru>

S. Belkin (IKI), A. Novichonok (Petrozavodsk State University, KIAM), A. 
Pozanenko (IKI),�� E. Mazaeva�� (IKI), A. Volnova (IKI), I. Molotov 
(KIAM), Sh. Ehgamberdiev (UBAI) report on behalf of IKI-GRB-FuN:

We continued observations of GRB 200613A (Fermi GBM team, GCN 27926; 
Bissaldi et al., GCN 27930; Ohno et al., GCN 27931; Yamaoka Ohno et al., 
GCN 27964) with�� Kitab-ISON RC-36 telescope in Clear filter. The optical 
afterglow (e.g., Kann et al., GCN 27935; Pozanenko et al., GCN 27937; 
Izzo et al., GCN 27939; Zhu et al., GCN 27943) is detected in a stacked 
image. Preliminary photometry of the afterglow is following

Date,���������� UT start, t-T0,���� Exp.,�� Filter, OT,������ Err., UL
 �������������������������������������� (mid, days)
2020-06-14�� 16:56:58 1.5086�� 5460���� CR���������� 19.68�� 0.13�� 21.2
2020-06-15�� 16:54:39 2.4997�� 4200���� CR���������� 20.4���� 0.3���� 20.4
2020-06-16�� 16:30:51 3.5005�� 7200 �� CR �� ���� n/d ���� n/d �� 20.5


The photometry is based on nearby SDSS DR12 stars
SDSS-DR12_id�������������� R(Lupton)
J101149.76+454320.7 12.404
J101245.45+455119.1 13.328