Comparison of the accumulative number of detections of the 226.1–228.1 GHz EHT data of Sgr A^* from 7 April 2017 and M87^* data from 11 April 2017 from different data reductions. The visibilities are averaged into a single frequency channel and time-averaged into 120 s bins. The signal-to-noise ratio (ξ) is computed from the total intensity data (averaged parallel-hand correlation products after the polarization calibration). Only data with ξ > 3 are considered as detections, which are counted on all baselines. The detections are plotted as cumulative distributions minus the function f (ξ) = 280 log (ξ) − 305.