TITLE: GCN CIRCULAR NUMBER: 41877 SUBJECT: The EP-WXT trigger 01709240768: Las Cumbres discovery of the optical counterpart DATE: 25/09/19 03:28:55 GMT FROM: Wenxiong Li at NAOC <liwenxiong1992@gmail.com> Wenxiong Li (NAOC), Iair Arcavi (TAU), Ido Keinan (TAU), David Sand (U of Arizona) We observed the position of EP-WXT trigger 01709240768 with a Las Cumbres 1m telescope at Cerro Tololo Inter-American Observatory 0.8 hours after the Einstein Probe WXT trigger. We took 2x300s exposures in the broad optical w band. We find an uncataloged source at RA=298.55383, Dec=-48.8378 within the EP/WXT error circle and measure the following preliminary photometry calibrated to the r band: MJD 60937.127 Mag 17.0 Additional followup is encouraged. View this GCN Circular online at https://gcn.nasa.gov/circulars/41877. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...