Comparison of the observed submillimeter flux density from Laboca and the predicted flux density based on the Herschel/Planck model. The dashed line shows a linear fit of all points with a predicted flux density of >0.4 Jy/beam. For comparison, the continuous line indicates the reference slope of 1 (arbitrarily set to intersect with the fit at its starting point of x = 0.4 Jy/beam) which would correspond to β = β_Planck. The difference in slope corresponds to a difference of Δβ = 0.15 (see text).