{
  "circularId": 44318,
  "createdOn": 1776398129439,
  "eventId": "EP260416a",
  "subject": "EP260416a: WFST optical observations and rebrightening",
  "format": "text/plain",
  "body": "Yan-Long Hua, Ding-Fang Hu, Jin-Jun Geng, Xue-Feng Wu, Hui Sun, Ye Li, Zhi-Ping Jin, Tian-Rui Sun, Yi-Fang Liang, Yuan-Tai Yang, Ji-An Jiang report on behalf of the WFST team: \n\nFollowing the detection of EP260416a by Einstein Probe (Hu et al., GCN 44307). 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 r-band began at 2026-04-16T17:54:47 UTC, approximately 12.4208 hours after the trigger. \n\nThe optical candidate reported by COLIBRÍ (Ducoin et al., GCN 44310) and SVOM/VT (Li et al., GCN 44315) was clearly detected in images in r band and showed significant rebrightening. The preliminary measurements are given in the AB magnitudes and are not corrected for Galactic extinction:\nr = 20.27 ± 0.01 (AB)\n\nWe encourage further follow-up observations.\nWe thank the WFST staff for supporting these observations.",
  "submitter": "ylhua@pmo.ac.cn",
  "submittedHow": "web"
}