TITLE: GCN CIRCULAR NUMBER: 44328 SUBJECT: EP260416a: LCO observations confirm end of flaring phase DATE: 26/04/17 13:52:03 GMT FROM: Antonio Martin-Carrillo at UCD,Space Science Group <antonio.martin-carrillo@ucd.ie> A. Martin-Carrillo (UCD), L. Cotter (UCD), A. J. Levan (Radboud & Warwick), J. A. Chácon (PUC), D. B. Malesani (DAWN/NBI and Radboud), P. G. Jonker (Radboud) report on behalf of a larger collaboration: We observed the field of EP260416a (Hu et al., GCN Circ. 44307) with the LCO 1m telescope located at the McDonald Observatory (Texas, USA) equipped with the SINISTRO instrument. We obtained 6x300s exposures in the r band starting at 09:58:28.32 UT on the 17th of April 2026, approximately 28.48 hr after the initial trigger. In the stacked images the optical counterpart (Ducoin et al., GCN 44310, Li et al., GCN 44315, Hua et al., GCN 44318, Lee et al., GCN 44319, Zheng et al., GCN 44321) is well detected, and we measure an AB magnitude of r = 20.78 +/- 0.06, calibrated using nearby stars from the Pan-STARRS catalogue and not corrected for Galactic extinction. Compared to the previous observations made by Lee et al. (GCN Circ. 44319) the counterpart seems to have faded by approximately 0.18 AB mag in 5.6 hr. View this GCN Circular online at https://gcn.nasa.gov/circulars/44328. --- To unsubscribe, open this link in a web browser: https://gcn.nasa.gov/unsubscribe/eyJhbGciOiJIUzI1NiJ9.eyJlbWFpbCI6InZzbmV0LW...