Radial surface brightness profile of the Coma cluster in the 0.4–2 keV band. The surface brightness is normalized per single (out of seven) eROSITA telescopes. The 90° wedge in the SW direction, which contains the NGC 4839 group, has been excluded from the analysis. The green points show the raw surface brightness (including all types of the background) as measured in the all-sky survey. The blue points are the same data after excising compact sources and removing different types of the residual background and foreground (both instrumental and astrophysical), and subtracting the estimated contribution of the stray light. The red points show similarly processed data from the data set discussed in this paper. For comparison, the thin black line shows a β−model with the co-radius r_c = 10′ and β = 0.73. Three vertical lines show R₅₀₀, R₂₀₀, and 2 × R₂₀₀. The dashed horizontal line shows the total background in the 0.4–2 keV band. The cyan curve shows the estimated level of the stray light, which was removed from the profiles. At the moment of writing, the exact shape and normalization of this component are still uncertain. Finally, the purple line shows the estimated level of flux variations associated with the Poisson fluctuations of the number of unresolved sources (in the outer regions where the Coma contribution is subdominant).