GCN Circular 43394
Subject
EP-WXT trigger 01709251266: SVOM/C-GFT confirmation of a stellar flare
Date
2026-01-14T00:30:43Z (4 days ago)
From
SVOM_group <svomgroup@bao.ac.cn>
Via
Web form
Z. Kang (CHO), C. Wu, L.P. Xin, X.H. Han, P.P. Zhang, X.M. Lu (NAOC), Z.W. Li, Y. Lv (CHO), R.S. Zhang, Y.J. Xiao, Y.L. Qiu, J. Wang, J.S. Deng, L. Huang, J.Y. Wei (NAOC) report on behalf of the SVOM/C-GFT team:
We observed the field of trigger 01709251266 detected by EP/WXT (Wang et al., GCN 43383) with LATIOS on SVOM/C-GFT. Observations started at 2026-01-12T18:15:35 UTC, ~5.63 min after the trigger.
A sequence of g-, r-, and i-band images was obtained over ~1.5 hr. Photometry of the suggested flare star LSPM J0924+304 shows a decline from ~13.3 to ~14.0 mag in g-band over ~90 min. The fading was initially fast, then slowed, and was flatter in the r and i bands. This confirms the EP X-ray trigger is associated with a stellar flare.
We thank the observation assistants Yin-Huai Hao and Chun-Lei Guo at Jilin observatory for their excellent support.
The Chinese Ground Follow-up Telescope (C-GFT) for the SVOM mission is located at Jilin Station, Changchun Observatory, National Astronomical Observatories, CAS. It features two instruments: (1) CATCH at the Cassegrain focus with a 21 arcsec x 21 arcsec FOV for simultaneous g/r/i-band imaging, and (2) LATIOS, a 4k x 4k CMOS camera at the prime focus with a 1.28 deg x 1.28 deg FOV that images in g, r, and i bands via filter switching.