GCN Circular 45097
Subject
GRB 260706A: EP-FXT follow-up observation
Event
Date
2026-07-07T07:46:49Z (5 days ago)
From
EP Team at NAOC/CAS <ep_ta@bao.ac.cn>
Via
Web form
Y.F. Liang, H. Zhou (PMO), K. R. Ni (CCNU), C.-K. Kan (HKU), H. Sun (NAOC) on behalf of the Einstein Probe (EP) team:
EP-FXT performed an automatically follow-up observation of GRB 260706A detected by SVOM/ECLAIRs (Alaux et al., GCN 45089), which also triggered Fermi-GBM (Fermi GBM team, GCN 45088; Trigg et al., GCN 45093). The follow-up observation started at 2026-07-06 17:44:38 (UTC), about 1.5 hr after the SVOM trigger, with a total exposure time of around 5462 ks.
On-ground analysis of the FXT data found an uncatalogued source within the ECLAIRs error circle at R.A., Dec. =33.8136, -49.1514 deg (J2000) with an uncertainty of about 10 arcsec (radius, 90% C.L. statistical and systematic). The derived average unabsorbed flux is 6.21 (-0.87/+1.03) x 10^(-12) erg/s/cm^2 (0.5-10 keV; 1-sigma uncertainty).
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).