TITLE: GCN CIRCULAR NUMBER: 31419 SUBJECT: GRB 220107A: AbAO and Terskol optical observations DATE: 22/01/09 12:27:19 GMT FROM: Alexei Pozanenko at IKI, Moscow N. Pankov (IKI), S. Belkin (IKI), A. Pozanenko (IKI), R. Ya. Inasaridze (AbAO), V. Agletdinov (KIAM), V. R. Ayvazian (AbAO), D. Datashvili (AbAO), G. V. Kapanadze (AbAO) report on behalf of GRB IKI FuN: We observed the field of GRB 220107A till now detected by GBM/Fermi (the Fermi/GBM team, GCN 1399; Kunzweiler et al. GCN 31400) and Swift (DeLaunay et al. GCN 31402) with AS-32 telescope of Abastumani observatory (AbAO) and K-800 telescope of Mnt. Terskol observatory. The optical afterglow (Hosokawa et al. GCN 31413; Siegel et al. GCN 31415; Zhu et al. GCN 31416) is detected in stacked images. Preliminary photometry of the afterglow is following. Date UT start t-T0 Filter Exp. OT UL(3sigma) Telescope (mid, days) (s) 2022-01-08 23:38:28 1.38573 R 42*60 20.26 0.14 21.4 AS-32 2022-01-09 01:58:01 1.48613 Clear 108*30 20.24 0.14 22.0 K-800 Photometry is based on the SDSS-DR12 nearby stars RA DEC R(Lupton transformations) 11:19:03.5786 +34:06:35.141 17.75 11:19:08.2856 +34:14:46.786 16.73 11:18:58.9570 +34:17:07.910 17.46 We note a presence of a galaxy 8.7 arcsec West presented as J111913.15+341014.4 in SDSS DR12 with r =19.623, i = 19.126 at photometric redshift of z_ph = 0.34 +/- 0.066. Despite the galaxy is unlikely to be the host galaxy of GRB 220107A, it might affect photometry of the afterglow in a crude plate scale images.