Notes. Upper part: high-fidelity (F ≥ 0.9) candidate list extracted via blind search using LINESEEKER. Lower part: source candidates extracted by cross-matching ALMA 1.2 mm continuum-selected sources with F > 0.2 with the MUSE catalog of z ≥ 2.5 sources. ⁽¹⁾Identifier of ALMA 1.2 mm continuum-selected candidates. If a source is also detected in its CO(4–3) line (see Sect. 3.2), the corresponding identifier from Table 3 is reported. If a source has been identified as low-z interloper, its identifier is also reported (see Sect. 3.5). The QSO and the nearby companion are labeled with the Calán-Tololo Survey (CTS, Maza et al. 1995) identifier and with “Object B”, respectively. Object B has been selected by LINESEEKER together with the QSO as a single source. Here we report, separately the coordinate of the continuum peak of the QSO CTS G18.01 and Object B obtained via a visual inspection. Their S/N and the fidelity are set to the values provided by the code that are referred to the continuum peak of Object B, which appears brighter than the QSO at 1.2 mm. ⁽²⁾Right Acension (ICRS). ⁽³⁾Declination (ICRS). ⁽⁴⁾Integrated flux density over the ≥2σ isophote. This quantity is not reported for compact sources at low S/N and for the QSO and Object B, which are partially blended. ⁽⁵⁾Continuum peak flux density at 1.2 mm. ⁽⁶⁾Continuum peak flux density at 3 mm. ⁽⁷⁾S/N of the 1.2 mm-selected sources. ⁽⁸⁾Fidelity and its uncertainties estimated by LINESEEKER using negative detections. ⁽⁹⁾High-confidence redshift estimate from MUSE spectroscopic data. For sources for which the redshift is not provided they either have an uncertain redshift measurement or they do not have any FUV-continuum counterpart from MUSE. ^( † )Source C06 has been unambiguously identified as a low-z interloper (“i1”) showing a bright emission line in the LSB of 3 mm ALMA band. For this galaxy we therefore report the low-confidence redshift provided by the analysis of the MUSE spectrum.