EP-WXT trigger 01709258455 likely indicates a stellar flare from RX J0920.0+3052.

AI Summary

The trigger, detected on 2026-02-17T21:46:05, shows an X-ray flux of approximately 8e-11 erg/s/cm^2 and luminosity of 5.2e30 erg/s. Follow-up observations with the Nordic Optical Telescope did not identify any new transient sources but noted an M-class dwarf with ROSAT X-ray emission within the error region.

Notices (1)

Einstein Probe WXT — GRB · Tue, 17 Feb 2026 21:46:05 GMT

GCN Circulars (2)

GCN-43777 — The EP-WXT trigger 01709258455 is likely a flaring star · Wed, 18 Feb 2026 02:52:19 GMT
The EP-WXT trigger 01709258455, detected on 2026-02-17T21:46:05, is identified as a stellar flare coming from RX J0920.0+3052. The estimated X-ray flux and luminosity of the flare are around 8e-11 erg/s/cm^2 and 5.2e30 erg/s, respectively.

GCN-43776 — EP-WXT 01709258455 · Wed, 18 Feb 2026 00:20:32 GMT
Astronomers using the Nordic Optical Telescope reported no new, uncatalogued sources within the error region of Einstein Probe trigger WXT 01709258455. They obtained 3-sigma upper limits of r > 23.8 and z > 22.0 for the potential transient, which cannot be corrected for Galactic extinction. An M-class dwarf with ROSAT X-ray emission was present in the error region, and the team could not determine if the trigger was due to a stellar flare.