A. S. Moskvitin (SAO RAS) on behalf of GRB follow-up team report.
We observed the field of the ZTF20acozryr/AT2020yxz (Coughlin et al.,
GCN 28841) associated with the GRB 201103B (Ursi et al., GCN 28831;
Svinkin et al., GCNs 28844, 28872; Evans et al., GCN 28858)
with Zeiss-1000 telescope of SAO RAS equipped with CCD photometer
on November 14, 20:58:48 -- 23:02:42 UT, t_mid - T0 = 11.1625 days.
We obtained 8 x 300 sec. images in Rc band.
The OT (Coughlin et al., GCN 28841; Xu et al., GCNs 28846, 28847;
Zhu et al., GCN 28854; Evans et al., GCN 28858; Mao et al.,
GCNs 28861, 28863; Belkin et al., GCNs 28862, 28875, 28883, 28886;
Sharma et al., GCN 28876; Paek et al., GCN 28880; Volnova et al.,
GCN 28925) is clearly detected in the stacked image with the
brightness of R = 22.8 +/- 0.2. This preliminary photometry is
based on R2 magnitudes of nearby USNO-B1 stars.