GCN Circular 45937
Subject
GRB 261010A: J-band upper limit by the SYSU 80cm infrared telescope
Event
Date
2026-10-13T10:41:14Z (6 hours ago)
From
Jinji Li <lijj328@mail2.sysu.edu.cn>
Via
Web form
Jin-Ji Li, Si-Rui Huang, Jian-Hong Cao, Zhong-Nan Dong, Rui-Chen Gao, Jia-Qi Lin, Pu Lin, Jing-Kai Sun, Yun Shi, Hao-Nan Yang, Hao-Ran Zhang, P. H. Thomas Tam, Rong-Feng Shen, and Bin Ma (Sun Yat-sen University) report on behalf of the SYSU 80cm infrared telescope team:
We observed the field of GRB 261010A, detected by Swift (Lien et al., GCN 45889) and Fermi/GBM (Fermi GBM Team, GCN 45888), using the Sun Yat-sen University (SYSU) 80cm infrared telescope. Our J-band observations were carried out on 2026 Oct 11 from 13:25:44 to 14:24:51 UT, approximately 18.1–19.1 hours after the Swift/BAT trigger. We combined 171 exposures of 20 s each.
We do not detect a counterpart at the reported optical afterglow position (O'Neill et al., GCN 45890; Corcoran et al., GCN 45912), down to a 5-sigma limiting magnitude of J ~ 19.6 mag (Vega).
The SYSU 80cm infrared telescope is operated and managed by the Department of Astronomy, Sun Yat-sen University.