Notes. ToS is the time on source in seconds. FoV is the field of view of the observations; it corresponds to a single pointing centred on the XRB, except for the case of Cir X-1, for which five consecutive pointings overlapping with Nyquist frequency and centred on the source were performed (we took as reference the primary beam of the ALMA antennas at 92 GHz, 63″). The synthesised beam is the beam achieved in the images. For the calculation of the physical scales in parsecs, we used the distances of the sources listed in Table 1. PWV is the average precipitable water vapour throughout each observation. The phase rms is shown before and after correcting differential phase errors introduced by PWV over the array. For Cyg X-1, the PWV and the phase rms are an average of the values of the two performed observations.