Energy (νE_ν) as a function of redshift for FRBs detected by ASKAP (red circles) and Parkes (blue squares). The dashed lines correspond to the fluence limit for ASKAP and Parkes (red and blue respectively) obtained assuming the average FRB duration of the respective samples. Top and right panels: energy and redshift distributions of the two samples (same colour coding of the central plot). The thin curves represent, for each data point, the 1σ uncertainty on the energy produced by the uncertainty on the redshift.