TITLE: GCN CIRCULAR NUMBER: 45385 SUBJECT: EP260806a: WFST optical observations DATE: 26/08/15 07:23:12 GMT FROM: ylhua@pmo.ac.cn Yan-Long Hua, Jin-Jun Geng, Tian-Rui Sun, Ye Li, Yi-Fang Liang, Yuan-Tai Yang, Ji-An Jiang, Zhi-Ping Jin and Xue-Feng Wu report on behalf of the WFST team: Following the detection of EP260806a by Einstein Probe (Li et al., GCN 45299), we performed follow-up observations using the Wide Field Survey Telescope (WFST Collaboration; arXiv:2306.07590) at the Lenghu Astronomical Observation Base in Qinghai Province, China. Observations in the g-band began at 2026-08-14T15:55:51 UTC, approximately 184.89 hours after the trigger. The optical candidate reported by LCO (Ducoin et al., GCN 45300) and COLIBRÍ (Antonio et al., GCN 45306) was detected as the optical counterpart. We performed image subtraction on the stacked images using PanSTARS templates and detected the optical counterpart (He et al., GCN 45300; de Ugarte Postigo et al., GCN 45302) in both bands. No other sources are detected within the EP/FXT error region (Li et al., GCN 45299). The preliminary measurements are given in AB magnitudes and are not corrected for Galactic extinction: g = 18.312 ± 0.008 (AB) We thank the WFST staff for supporting these observations. View this GCN Circular online at https://gcn.nasa.gov/circulars/45385. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...