GCN Circular 33177
Subject
GRB 230116D: Nanshan/NEXT optical afterglow detection
Date
2023-01-16T22:26:11Z (a year ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
Z.P. Zhu (NAOC, HUST), D. Xu, S.Q. Jiang, S.Y. Fu, X. Liu, T.H. Lu
(NAOC), X. Gao (Urumqi No.1 Senior High School), J.Z. Liu (XAO) report:
We observed the field of GRB 230116B detected by Swift (Sonbas et al.,
GCN 33176) using the NEXT-0.6m telescope located at Nanshan, Xinjiang,
China. Observations started at 21:06:37 UT on 2023-01-16, i.e., 114 s
after the Swift/BAT trigger. A series of frames in the Sloan r- and z-
filters were obtained.
An uncatalogued and decaying optical transient is detected at the
Swift/XRT position (Sonbas et al., GCN 33176) at coordinates
R.A. (J2000) = 6:34:28.21
Dec. (J2000) = +49:52:20.38
with a positional uncertainty of ~0.3 arcsec and r ~ 19.1 mag at ~189 s
after the BAT trigger. We thus conclude that the transient is the
afterglow of the burst.