GCN Circular 45187
Subject
GRB 260718A: EP-FXT follow-up observation
Event
Date
2026-07-19T02:45:20Z (a month ago)
From
EP Team at NAOC/CAS <ep_ta@bao.ac.cn>
Via
Web form
A.Li (BNU), C. Y. Wang (THU), Y. Q. Zhao (USTC,PRIC), J. P. Chen (SYSU), W.Chen and H. Sun (NAO, CAS) on behalf of the Einstein Probe (EP) team:
EP-FXT performed a follow-up observation of GRB 260718A detected by SVOM/ECLAIRs (Antier et al., GCN 45177), which also triggered Fermi-GBM (Holzmann Airasca et al., GCN 45181). The follow-up observation started at 2026-07-18T12:09:38 (UTC), about 53 min after the SVOM-ECLAIRs trigger, with a total exposure time of around 6.2 ks. An uncatalogued source was found within the ECLAIRs error circle. The position of the source is at R.A., Dec. = 37.3004, -56.1050 deg (J2000) with an uncertainty of 10 arcsec (radius, 90% C.L. statistical and systematic). The average unabsorbed flux is 2.16(+0.62/-0.33) x 10^(-12) erg/s/cm^2 in the 0.5-10 keV energy band.
Launched on January 9, 2024, EP is a space X-ray observatory to monitor the soft X-ray sky with X-ray follow-up capability (Yuan et al. 2022, Handbook of X-ray and Gamma-ray Astrophysics).