EP-WXT trigger 01709258631 identified as a likely stellar flare.
AI Summary
The trigger, detected on Feb 25, 2026, corresponds to an X-ray flare from RX J1220.4+1226 with a flux of 4e-11 erg/s/cm^2. Follow-up optical observations by COLIBRÍ confirmed the absence of new sources within the error region, supporting the flare identification.
Measurements
| Event ID | 01709258631 |
|---|---|
| Source | Einstein Probe WXT |
| Alert type | GRB |
| Significance | medium |
| Trigger time (UTC) | Wed, 25 Feb 2026 03:33:22 GMT |
| Right ascension (J2000) | 185.134° |
| Declination (J2000) | 12.435° |
| Position error radius | 0.05268796° |
| Image SNR | 7.2 |
| GCN notices | 1 |
| GCN circulars | 2 |
Notices (1)
Einstein Probe WXT — GRB · Wed, 25 Feb 2026 03:33:22 GMT
GCN Circulars (2)
GCN-43827 — EP 260225
· Wed, 25 Feb 2026 06:39:13 GMT
A group of astronomers using the COLIBRÍ telescope in Mexico observed a flaring star in the EP-WXT trigger 01709258631 field, confirming previous reports. They did not detect any new source within the uncertainty region, and the observation supports the identification of the trigger as a flaring star.
GCN-43825 — The EP-WXT trigger 01709258631 is likely a flaring star
· Wed, 25 Feb 2026 06:09:06 GMT
The EP-WXT trigger 01709258631, detected on February 25, 2026, is a likely stellar flare associated with the star RX J1220.4+1226. The estimated flux of the flare is around 4e-11 erg/s/cm^2 in the 0.5-4.0 keV range, corresponding to an X-ray luminosity of 4e+31 erg/s.
AI summary generated Fri, 13 Mar 2026 14:14:32 GMT.