GCN Circular 42934
Subject
The EP-WXT trigger 01709249064: Las Cumbres discovery of the optical counterpart
Date
2025-12-02T02:44:37Z (a day ago)
From
Wenxiong Li at NAOC <liwenxiong1992@gmail.com>
Via
Web form
Wenxiong Li, Runduo Liang (NAOC), Iair Arcavi (TAU), Ido Keinan (TAU), David Sand (U of Arizona)
We observed the position of The EP-WXT trigger 01709249064 with a Las Cumbres 1m telescope at Teide Observatory, Tenerife, 18 mins after the Einstein Probe WXT trigger. We took 2x300s exposures in the broad optical w band.
We find a uncataloged source at RA=122.1143 Dec=40.6123 within the EP/WXT error circle and measure the following preliminary photometry calibrated to the r band:
MJD 61011.089 Mag 15.6
We find a faint red likely extended source at this position in Legacy Survey data (https://www.legacysurvey.org/viewer).
Additional followup is encouraged.