TITLE:   GCN CIRCULAR
NUMBER:  33179
SUBJECT: GRB 230116D: SAO RAS observations of OT brightening
DATE:    23/01/16 23:07:21 GMT
FROM:    Moskvitin Alexander at SAO RAS  <mosk@sao.ru>

A. S. Moskvitin, O. I. Spiridonova and O. A. Maslennikova (SAO RAS),
report on behalf of the GRB follow-up team.

We observed the field of the GRB 230116D (Sonbas et al. GCN #33176)
with the SAO RAS 1-m telescope Zeiss-1000 + CCD-photometer in Rc band.

Inside the XRT error circle we detected new transient object
reported by Zhu et al. (GCN #33177) and Nazarov et al. (GCN #33178)
with the coordinates
R.A. = 06:34:28.2
Dec. = +49:52:20.5 (+/- 0".3, J2000) and brightness
R = 19.93 +/- 0.07 (T - T0 = 0.9378h),
R = 19.72 +/- 0.06 (T - T0 = 1.4236h)
Preliminary photometry is based on R2 magnitudes of nearby USNO-B1 stars.

Further observations are ongoing and encouraged.