TITLE:   GCN CIRCULAR
NUMBER:  37109
SUBJECT: EP-WXT trigger 01709018832: SVOM/C-GFT observations of the star flare
DATE:    24/08/09 02:07:10 GMT
FROM:    Chao Wu at NAOC <wuchao.lamost@gmail.com>

Xuhui Han (NAOC), Zhe Kang (CHO), Liping Xin (NAOC),Chao Wu (NAOC),
Xiaomeng Lu (NAOC), Pinpin Zhang (NAOC), Ruosong Zhang (NAOC)，You Lv
(CHO)，Yujie Xiao(NAOC),  Yulei Qiu (NAOC), Jing Wang(GXU/NAOC), Zhenwei Li
(CHO)，and Jianyan Wei (NAOC) on behalf of SVOM GRB team

We observed the field of the fast X-ray transient WXT trigger 01709018832
from the Einstein Probe (Jiang et al. GCNC 37090) starting at 14:46 UT,
August 7, 2024, ~8.4 hr after the trigger with C-GFT (Chinese Ground
Follow-up Telescope in SVOM mission) in System Test Mode (STM). C-GFT is
located at Jilin (long.=126.33 deg, lat.= 43.8243778 deg), Changchun
Observatory, National Astronomical Observatories, CAS. It has FOV of 1.28
deg x 1.28 deg with a 4k*4k CMOS detector mounted on the primary focus of
1.2-meter-aperure telescope.

A series of g,r,and i band images were obtained during 18 min observation.
The exposure time was 30*10 seconds for each band. Preliminary analysis
shows that the brightness of the flare star (Gaia DR3 2445442335531658752)
 were g=17.6, r=17.1 and i=15.5, without any variation.  Comparing with the
magnitude (g=18.3, r=17.1, i=15.4 ) from Pan-STARRS(PS1), the r and i band
magnitudes are consistent with PS1 catalog, but it was still brightening of
0.6 magnitude at g band. Combined with the results reported by Weikang et
al. (GCN 37095), we  confirm that the flare star  was still at the flaring
status after ~8.4 hr from the trigger with g band observations.

We thank the observation assistants Wenbo Li and Chunlei Guo at Jilin
observatory for their excellent support.