No features whatsoever in the 0.1-2 keV
band
The spectrum is within £ 4% from the best-fitting bb
The total power radiated by the surface
in the 0.1-2 keV band
is » 30-50% of the bb power, slightly larger for the meridional
temperature variation models
The constant temperature spectrum shows
no hardening,
while for T(q) it is Tcol/Teff = g » 1.13