Comparison of the SZ measurements on the full locally brightest galaxy sample for two different photometry methods: the matched multi-filter (MMF) and the aperture photometry (AP) approach. For this figure and only for this figure, we assume point-like objects for both methods and plot the derived total SZ flux (or the flux within 5R₅₀₀ for MMF). The signal detected by the two methods is consistent at all stellar masses when only three frequencies are used, but when four frequencies are used, the AP results are contaminated by high frequency emission at stellar masses below  ~2 × 10¹¹ M_⊙.