EP260502a

General information

EP260502a was detected as a fast X-ray transient by Einstein Probe/WXT on 2026-05-02T06:08:51 UTC, with an automatic EP/FXT follow-up detection providing a refined X-ray position. Subsequent EP analysis reports the event is likely a stellar flare associated with SIPS J1809-7613.

Wavelength coverage

X-ray: EP/WXT trigger and spectral/flux characterization; EP/FXT follow-up with rapid fading and spectral/flux characterization.
Optical: LCO 1m and BOOTES-7 reported early non-detections/limits; BOOTES-7 also reports fading of a nearby catalogued source in r' during early sequence. No observations were mentioned in gamma-ray, UV, IR, radio, GW, or neutrinos.

Lightcurve and spectrum

Redshift

What’s special vs typical

GCN 44483: EP260502a is likely a flaring star

2026-05-06T10:24:37.409Z | rev 0

GCN 44444: EP260502a: BOOTES-7 observations of a fading catalogued source close to the X-ray position

2026-05-02T15:48:54.211Z | rev 0

GCN 44442: GRB EP260502a: BOOTES-7: early optical upper limit

2026-05-02T09:00:37.771Z | rev 0

GCN 44442: EP260502a: BOOTES-7: early optical upper limit

2026-05-02T09:00:37.771Z | rev 2

GCN 44441: EP260502a: Las Cumbres upper limit

2026-05-02T07:43:21.082Z | rev 0

GCN 44440: EP260502a: Einstein Probe detection of an X-ray transient

2026-05-02T07:20:32.812Z | rev 0