GCN Circular 29240
Subject
GRB 210102B: Assy optical observations
Date
2021-01-04T18:06:38Z (3 years ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
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.