Einstein Probe detects and follows up a short-lived X-ray transient.

AI Summary

A short-lived, double-peaked X-ray transient was detected by the Einstein Probe's Wide-field X-ray Telescope (WXT) with an average unabsorbed 0.5-4 keV flux of 7.41 erg cm^-2 s^-1. Follow-up observations using the EP-FXT instrument confirmed an uncatalogued source with a low signal-to-noise ratio, showing an absorbed power-law spectrum.

Measurements

Notices (1)

Einstein Probe WXT — GRB · Thu, 03 Sep 2026 11:17:51 GMT

GCN Circulars (2)

GCN-45522 — EP260903a · Sun, 06 Sep 2026 15:15:50 GMT
The Einstein Probe (EP) performed a follow-up observation of the X-ray transient EP260903a, detecting an uncatalogued X-ray source with a low signal-to-noise ratio. The source was found to have an absorbed power-law spectrum with a photon index of 3.36 and an average unabsorbed 0.5-10 keV flux of 6.89 x 10^-14 erg cm^-2 s^-1.

GCN-45513 — EP260903a · Fri, 04 Sep 2026 08:19:20 GMT
A fast X-ray transient, designated EP260903a, was detected by the Wide-field X-ray Telescope on the Einstein Probe mission. The transient lasted approximately 200 seconds and exhibited a double-peaked structure, with an average unabsorbed 0.5-4 keV flux of 7.41 erg cm^-2 s^-1.