Dispersive and scattering smearing time as a function of the DM. The black line represents the intra-channel dispersive smearing. The red lines correspond to the intra-subband dispersive smearing. The dashed green lines indicate the used time sampling. On the top, the dotted black line shows the average scatter broadening, and the blue line indicates the median of the period of all the non-MSPs in the ATNF catalogue. The pink area marks the DMs not searched for in the NPBS.