GCN Circular 33178
Subject
GRB 230116D: Sintez-Newton/CrAO optical afterglow detection
Date
2023-01-16T22:42:57Z (a year ago)
From
Alexei Pozanenko at IKI, Moscow <apozanen@iki.rssi.ru>
S. Nazarov (CrAO), A. Pozanenko (IKI), S. Belkin (IKI, HSE), N. Pankov
(HSE) report on behalf of IKI GRB FuN:
We observed GRB 230116D (Sonbas et al., GCN 33176) with Sintez-Newton
telescope of CrAO observatory. Observation started on 2023-01-16 (UT)
21:21:41. The series consists of images with an exposure of 120 s in
Clear filter.
In the first images we detect an object in coordinates (J2000)
06:34:28.01 +49:52:20.35 (with uncertainties of 0.5 arcsec) which is
within of the XRT error circle (Sonbas et al., GCN 33176).
Preliminary photometry of the afterglow is 19.5 at (UT) 21:41:56. The
photometry is based on nearby USNO-B1.0 (R2) stars. There is no object
in PS1 and DSS2 catalogues at this coordinates. Therefore we suggest the
object is the afterglow of GRB 230116D. Observation is continuing.