  We present a detailed spectral and timing analysis of X-ray observations of
the brightest eclipsing systems Alpha Coronae Borealis taken by XMM-Newton. We
got from the thermal plasma model metal the abundances of some elements (O, Mg,
Si, and Fe) and an emission line at 1.3 Kev from the simple Gaussian line
profile. From the light curves, there is a strong active region at the lower
left in the maps, near the limb of the G component, and increasing in some
parts which means a band diagonally running across the G star disk from lower
left to upper right, close to the projected center.
