TITLE:   GCN CIRCULAR
NUMBER:  44042
SUBJECT: IceCube-260315A/AT2026fpm: EP-FXT follow-up observation
DATE:    26/03/18 04:57:04 GMT
FROM:    EP Team at NAOC/CAS <ep_ta@bao.ac.cn>

J. P. Feng, B. Zhang (USTC), H. N. Yang, Y. Liu (NAO, CAS) on behalf of the Einstein Probe (EP) team:

The Follow-up X-ray Telescope (FXT) on board the Einstein Probe (EP) performed a follow-up observation of AT2026fpm (Segura et al., GCN 44023) at UTC 2026-03-16T23:31:53 (T0+45.21h) (The IceCube Collaboration, GCN 44017). An X-ray source was detected at R.A. = 176.1586 deg, DEC = -2.6035 deg (J2000) with an uncertainty of 10 arcsec in radius (90% C.L. statistical and systematic) and the flux of 1.1×10^(-13) erg/s/cm^2 in 0.5-10 keV band. The X-ray position is consistent with the optical transient AT2026fpm, which is spatially consistent with a QSO at z=1.389.

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).