GCN Circular 43904
Subject
EP260302a: LCO observations
Event
Date
2026-03-03T10:57:45Z (2 days ago)
From
Laura Cotter at University College Dublin <laura.cotter@ucdconnect.ie>
Via
Web form
G. Corcoran (UCD), L. Cotter (UCD), J. Chacón (PUC), J. A. Quirola-Vasquez (Radboud), A. Martin-Carrillo (UCD), F. E. Bauer (UTa), P. G. Jonker (Radboud) report on behalf of a larger collaboration:
We observed the field of the fast X-ray transient EP260302a (Zhang et al., GCN 43899) with the LCO 1m telescope located at the Cerro Tololo Inter-American Observatory (Chile) equipped with the SINISTRO instrument. We obtained 6 x 300 exposures in each of the r and z filters, starting on 2026-03-03 at 02:20:48 UT (~2.46 hr post the EP trigger).
In our stacked images for both filters we detect the optical counterpart reported by Li et al. (GCN 43898) and Perez-Garcia et al. (GCN 43903), with the following magnitudes:
r = 20.84+/-0.11
z = 20.38+/-0.14
The counterpart has faded significantly since the previous reports. These values are in the AB system and are calibrated to Pan-STARRS. These values are not corrected for Galactic extinction.