Extended Data Fig. 4: Coadded HETG zeroth-order spectrum from an annulus of inner-to-outer radii of 2.5″ –5.0″ around M81*.
From: An energetic hot wind from the low-luminosity active galactic nucleus M81*
The spectrum can be well fitted by an absorbed power-law, shown as the magenta line. The error bars are of 1σ. The ratio of residual/error is shown in the bottom panel. An additional thermal component, represent by an apec model with a plasma temperature of 0.9 keV, is allowed by the data and shown as the blue line. The sum of the power-law and apec is plotted as the black line.
