GCN Circular 37960
Subject
GRB 241030A: TRT optical observations
Date
2024-10-30T09:54:50Z (a month ago)
From
Dong Xu at NAOC/CAS <dxu@nao.cas.cn>
Via
Web form
J. An, S.Y. Fu (NAOC), S. Tinyanont, R. Anutarawiramkul, P. Butpan (NARIT), S.Q. Jiang, X. Liu, Z.P. Zhu, Z. Fan, W.X. Li, N.C. Sun, Y.N. Wang, D. Xu (NAOC) report on behalf of a large collaboration:
We observed the optical afterglow of GRB 241030A detected by Fermi/GBM (Fermi GBM team, GCN 37955) and Swift/BAT (Klingler et al., GCN 37956), using the 0.7-m telescope of the Thai Robotic Telescope network (TRT), located at Fresno, California, U.S.A.
Observations started at 06:14:49.0 UTC on 2024-10-30, i.e., 27 mins after the Swift/BAT trigger, and we obtained a series of 60 s, 90 s, and 180 s frames in the R-filter.
The optical afterglow was decaying during our observations, and had R = 14.77 +/- 0.01 mag at 0.45 hr post-trigger, calibrated with nearby Pan-STARRS stars and not corrected for Galactic extinction.