STARITHM
Stellar flare from high-proper-motion star [SLS2012] PYC J23504+4455 detected by Einstein Probe WXT.
AI Summary
An X-ray flare with a flux of 8.0 x 10^(-11) erg/s/cm^2 and X-ray luminosity of 3.4 x 10^31 erg/s was observed from the star [SLS2012] PYC J23504+4455, confirmed by optical observations showing the star's brightness decreasing over 15 minutes.
Measurements
| Event ID | 01709320908 |
|---|---|
| Source | Einstein Probe WXT |
| Alert type | GRB |
| Significance | medium |
| Trigger time (UTC) | Mon, 05 Oct 2026 21:32:28 GMT |
| Right ascension (J2000) | 357.594° |
| Declination (J2000) | 44.93° |
| Position error radius | 0.05088756° |
| Image SNR | 8.6 |
| GCN notices | 1 |
| GCN circulars | 2 |
Notices (1)
Einstein Probe WXT — GRB · Mon, 05 Oct 2026 21:32:28 GMT
GCN Circulars (2)
GCN-45814 — The EP-WXT trigger 01709320908 is likely a flaring star
· Tue, 06 Oct 2026 02:10:53 GMT
The Einstein Probe (EP) detected a likely stellar flare from the high proper motion star [SLS2012] PYC J23504+4455 on October 5, 2026, with an estimated flux of 8.0 x 10^(-11) erg/s/cm^2 and an X-ray luminosity of 3.4 x 10^31 erg/s. This event was confirmed by optical observations.
GCN-45813 — EP trigger 01709320908
· Mon, 05 Oct 2026 22:44:02 GMT
Astronomers at the Ondrejov Observatory detected a fading star, PYC J23504+4455, near the position of an X-ray trigger from the Einstein Probe. The star's brightness decreased by 0.4 magnitudes over 15 minutes, suggesting the trigger was caused by a stellar flare rather than a gamma-ray burst (GRB).
AI summary generated Tue, 06 Oct 2026 02:27:54 GMT.