EP-WXT Trigger 01709258652 Likely Stellar Flare Event Confirmed

AI Summary

The EP-WXT trigger 017258652, detected on 2026-02-26, appears to be a stellar flare originating from LP 435-538. This conclusion is supported by multiple observations with various telescopes, including the AZT-33IK telescope and the Chinese Ground Follow-up Telescope (C-GFT) at Jilin Station. The initial net count rate derived from an accumulated image in the energy range of 0.5-4 keV suggests a low flux, but subsequent observations indicate significant variability within one hour of the event. No substantial variability was noted within an hour of these observations.

Measurements

Notices (1)

Einstein Probe WXT — GRB · Thu, 26 Feb 2026 13:49:59 GMT

GCN Circulars (4)

GCN-44400 — The EP-WXT trigger 01709258652 · Thu, 23 Apr 2026 13:31:19 GMT
The EP-WXT trigger 01709258652 was observed with the AZT-33IK telescope starting 8 hours after the trigger. No significant variability was detected within 1 hour of the observations.

GCN-43889 — EP-WXT trigger 01709258652 · Sun, 01 Mar 2026 13:18:28 GMT
The 50cm Telescope at Yunnan University observed a stellar flare in the star LP 435-538, which was triggered by the EP/WXT satellite. The flare caused a decline in the star's g-band magnitude from 14.41 to 14.89 over a period of approximately 47 minutes. This observation supports the previous finding of a stellar flare associated with the EP X-ray trigger.

GCN-43857 — EP-WXT trigger 01709258652 · Fri, 27 Feb 2026 02:06:29 GMT
The SVOM/C-GFT team confirmed a stellar flare using g-, r-, and i-band observations with the Chinese Ground Follow-up Telescope (C-GFT) at Jilin Station. The flare, detected by EP/WXT, occurred in the star LP 435-538 and caused a decline in magnitude from 13.8 to 15.4 in the g-band over approximately 110 minutes.

GCN-43849 — The EP-WXT trigger 01709258652 is likely a flaring star · Thu, 26 Feb 2026 16:09:54 GMT
The EP-WXT trigger 01709258652, detected on 2026-02-26, is likely a stellar flare from the star LP 435-538. The estimated flux of the flare is around 8e-11 erg/s/cm^2 in the 0.5-4.0 keV energy range, corresponding to an X-ray luminosity of approximately 2.071e+31 erg/s. A follow-up observation with the FXT telescope confirmed the source position and detected X-ray emission consistent with the star.