GCN Circular 29240
A. Pozanenko (IKI), S. Belkin (IKI), V. Kim (FAI, Pulkovo Observatory), M. Krugov (FAI) report on behalf of GRB IKI FuN: We observed MAXI GRB 210102B (Guo et al., GCN 29223) with AZT-20 telescope of Assy-Turgen observatory starting on Jan. 03 (UT) 13:00:53. i.e. ~1.6 days after trigger. At the place of the only one of XRT candidates (Burrows et al., GCN 29230) in the localization area of MAXI (Guo et al., GCN 29223) we clearly detect the optical object in coordinates (J2000) 23:35:15.88 -21:04:55.5 with uncertainness of 0.6 arcsec in both coordinates. Preliminary photometry of the object is following Date UT start t-T0 Filter Exp. OT Err. UL (3sigma) (mid, days) (s) 2021-01-03 13:00:53 1.19068 r'(AB) 75*60 22.2 0.2 23.0 The photometry is based on the stars of PanSTARRS-PS1 RA DEC r' 23:35:20.67802 -21:04:16.4688 19.656 23:35:47.99017 -21:11:53.6544 17.807 At this tome we cannot confirm variability of the source. We can suggest the object might be related to GRB 210102B.