GRB 200613A: continued Kitab optical observations

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