GCN Circular 46243
Subject
EP-WXT trigger 01709322272 : SVOM/C-GFT observations of a stellar flare
Date
2026-11-13T06:59:31Z (2 days ago)
From
SVOM_group <svomgroup@bao.ac.cn>
Via
Web form
Y.X. Guan (GXU), Z. Kang (CHO), C. Wu , L.P. Xin (NAOC), S.J. Yin, Y.Y. Shi(GXU), 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 EP-WXT trigger 01709322455 (Lao et al., GCN 46238) with LATIOS on SVOM/C-GFT. Observations started at 2026-11-12T13:32:57.630 UTC, ~6.75 min after the trigger.
We obtained g-, r-, and i-band imaging of G 6-43 over ~1.98 hr. The source shows fading in all bands, with the largest amplitude in the g-band and decreasing towards the i-band (g > r > i). This wavelength dependent fading, despite the observations being near T0, is consistent with the expected color evolution of a stellar flare decay.
The photometry was calibrated against nearby Pan-STARRS1 DR1 stars and no correction for Galactic dust extinction was applied.
We thank the observation assistants Yinhuai Hao and Chunlei 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 arcmin x 21 arcmin 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.