GCN Circular 43929
Subject
The EP-WXT trigger 01709258759: Las Cumbres discovery of the optical counterpart
Event
Date
2026-03-06T02:31:14Z (7 days ago)
Edited On
2026-03-09T13:40:07Z (3 days ago)
From
Wenxiong Li at NAOC <liwenxiong1992@gmail.com>
Edited By
Judith Racusin at NASA/GSFC <judith.racusin@nasa.gov> on behalf of Malte Busmann at Ludwig-Maximilians-Universität München <m.busmann@physik.lmu.de>
Via
Web form
Wenxiong Li, Runduo Liang (NAOC), Iair Arcavi, Ido Keinan (TAU), David Sand (U of Arizona)
We observed the position of the EP/WXT trigger 01709258759 with a Las Cumbres 1m telescope at McDonald Observatory, Texas, 20 mins after the Einstein Probe WXT trigger. We took 2x300s exposures in the broad optical w band.
We find an uncataloged source at RA=145.9490, Dec=15.6937 within the EP/WXT error circle and measure the following preliminary photometry calibrated to the r band: MJD 61105.08 Mag 21.6