Four best candidates from the IRAM 30m pulsar survey as evaluated from a combination of detection significance and the characteristics of the candidate after folding. The main properties on which our selection is based are persistence of the signal in time, significance in the period-period derivative panel, σ value, and the profile shape. A list with the properties of these four and the other selected best candidates is given in Table 4. Upper left panel: candidate with a close period to one of the synthetic injected pulsars, but we remark that the candidate arises from data with no mock pulsar injected. Bottom right panel: the candidate has a relatively close period to PSR J1745−2900, but it seems to be harmonically unrelated. A description of the different panels of the plots is presented in the caption of Fig. 2.