GCN Circular 45325
Subject
EP260809a: LCO optical observation
Event
Date
2026-08-09T05:04:21Z (23 days ago)
From
sqjiang at NAOC <sqjiang@bao.ac.cn>
Via
Web form
S.Q. Jiang, L.B. He, J. An, X. Liu, Z.P. Zhu, Z. Fan, W.X. Li, D. Xu(NAOC), S.Y. Fu (HUST), Y.L. Hua (PMO) report:
We observed the field of EP260809a detected by EP (Sun et al., GCN 45321), using an LCO 1m telescope located at the Teide Observatory (Spain) equipped with the SINISTRO instrument. Observation started at 2026-08-09T03:55:09.359 UT, i.e., 3.27 hr after the trigger, and 3x200 s Sloan r-band frames were obtained.
The optical counterpart (Adami et al., GCN 45324) is marginally detected in our stacked image with a brightness of r ~ 22 at a median time of 3.36 hr since trigger, calibrated with Pan-STARRS DR2 stars in the field and not corrected for Galactic extinction.