GCN Circular 46253
Subject
GRB 261113A: Optical detection with 60cm Panzhihua Telescope
Event
Date
2026-11-13T17:58:22Z (2 days ago)
From
Jiewei Zhao at SWIFAR, YNU <meow.jiewei.zhao@gmail.com>
Via
Web form
Jiewei Zhao, Xinchao Wang, Brajesh Kumar, Wenyu Li, Guowang Du, Yuanpei Yang (SWIFAR, YNU), Bin-Bin Zhang, Kamil Nadaf (NJU), Kai Liao, Xinyu Wang, Xing Yao, Yang Zeng and Chunlai Zhang (SSO) report on behalf of a larger collaboration:
We observed the GRB 261113A field detected by SVOM/ECLAIRs (Saccardi et al., GCN 46244). The observations were initiated at 2026-11-13T16:06:31.98 (~1.59 hours after the trigger) with the 60cm Panzhihua Telescope located at the Sichuan South Observatory (SSO), China. Several frames with 300s exposure each were acquired in L band.
We clearly detect the optical counterpart (Lei et al., GCN 46248; Li et al., GCN 46249; Yin et al., GCN 46250; Chen et al., GCN 46251; Wu et al., GCN 46252) in the stacked image. The L-band preliminary photometric magnitudes are following:
MJD (Exp_Start) MAG FILTER EXPTIME
61357.671203 20.18 +/- 0.13 L 5 x 300s
61357.690732 20.44 +/- 0.19 L 5 x 300s
Note that the expected Galactic extinction is not applied in our estimates.