MDP in the 4.0–8.0 keV band (square data points) for a 2 Ms-long observation as a function of the distance from the center of the FOV for the clouds MC2 (a), Bridge B2 (b), Bridge E (c), and G0.11-0.11 (d). The circled data points refer to the MC distance from the center of the FOV in the nominal IXPE pointing. The dashed line is the polarization degree fromthe model of Marin et al. (2015) diluted by the unpolarized emission in the 4–8 keV energy range. The shaded region within the dash-dotted lines covers the polarization degree range predicted for other line-of-sight distances for each MCreported in Table 1, diluted by the unpolarized emission in the 4–8 keV energy range.