TITLE: GCN CIRCULAR NUMBER: 43255 SUBJECT: The EP-WXT trigger 01709250693/GRB 251230a: Las Cumbres detection of the optical counterpart DATE: 25/12/30 02:02:19 GMT FROM: Wenxiong Li at NAOC <liwenxiong1992@gmail.com> Wenxiong Li, Runduo Liang (NAOC), Iair Arcavi (TAU), Ido Keinan (TAU), David Sand (U of Arizona) We observed the position of EP-WXT trigger 01709250693/GRB 251230a with a Las Cumbres 1m telescope at Sutherland Observatory, South Africa, 9 mins after the Einstein Probe WXT trigger. We took 2x300s exposures in the broad optical w band. We find an uncataloged source at RA=179.8972, Dec=11.4383 within the EP-WXT error circle and measure the following preliminary photometry calibrated to the r band: MJD 61039.063 Mag 15.1 The position of the counterpart is consistent with that reported by Lanava et al. (GCN 43252). View this GCN Circular online at https://gcn.nasa.gov/circulars/43255. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...