Current Issue

Vol.40 No.1 2026

About the Cover: (Image: EP Science Center, National Astronomical Observatories, CAS/Sci Visual) Einstein Probe (EP), an astronomical satellite built by the Chinese Academy of Sciences (CAS) in cooperation with its European partners, detected a weird source in X-rays. Unlike any previously documented transient, it was unusually bright, and evolved very fast. Its furious flares, first emerged in X-rays, shortly hardened and peaked at tens of MeV in the gamma-ray band, sustaining for hours. The peak flares decayed soon, and a soft X-ray afterglow rose to dominate the spectrum. What drastic cosmic event could have produced such a bright, fast evolving radiation? Find it out in page 28.