TITLE: GCN CIRCULAR NUMBER: 45057 SUBJECT: EP260628a: EP-FXT follow-up observation DATE: 26/06/30 02:51:19 GMT FROM: EP Team at NAOC/CAS <ep_ta@bao.ac.cn> X. Mao (NAO, CAS), C. Y. Dai (NJU), H. N. Yang, C. C. Jin (NAO, CAS) on behalf of the Einstein Probe (EP) team: EP-FXT performed a follow-up observation of EP260628a (X. Mao et al., GCN 45054) starting at 2026-06-29T06:40:57 (UTC), approximately 13.5 hours after the WXT detection. With an exposure time of 1.5 ks, no significant X-ray source was detected within the 2.8 arcmin radius of the EP-WXT position. The derived 0.5-10 keV upper limit is about 3.7 x 10^(-13) erg cm^-2 s^-1. Launched on January 9, 2024, EP is a space X-ray observatory to monitor the soft X-ray sky with X-ray follow-up capability (Yuan et al. 2022, Handbook of X-ray and Gamma-ray Astrophysics). View this GCN Circular online at https://gcn.nasa.gov/circulars/45057. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...