The ALPINE-ALMA large program targets the [ CII ] 158 \mu m line and the far-infrared continuum in 118 spectroscopically confirmed star-forming galaxies between z=4.4 and z=5.9 .
It represents the first large [ CII ] statistical sample built in this redshift range .
We present details of the data processing and the construction of the catalogs .
We detected 23 of our targets in the continuum .
To derive accurate infrared luminosities and obscured star formation rates , we measured the conversion factor from the ALMA 158 \mu m rest-frame dust continuum luminosity to the total infrared luminosity ( L _ { IR } ) after constraining the dust spectral energy distribution by stacking a photometric sample similar to ALPINE in ancillary single-dish far-infrared data .
We found that our continuum detections have a median L _ { IR } of 4.4 \times 10 ^ { 11 } L _ { \odot } .
We also detected 57 additional continuum sources in our ALMA pointings .
They are at lower redshift than the ALPINE targets , with a mean photometric redshift of 2.5 \pm 0.2 .
We measured the 850 \mu m number counts between 0.35 and 3.5 mJy , improving the current interferometric constraints in this flux density range .
We found a slope break in the number counts around 3 mJy with a shallower slope below this value .
More than 40 % of the cosmic infrared background is emitted by sources brighter than 0.35 mJy .
Finally , we detected the [ CII ] line in 75 of our targets .
Their median [ CII ] luminosity is 4.8 \times 10 ^ { 8 } L _ { \odot } and their median full width at half maximum is 252 km/s .
After measuring the mean obscured SFR in various [ CII ] luminosity bins by stacking ALPINE continuum data , we find a good agreement between our data and the local and predicted SFR-L _ { [ CII ] } relations of De Looze et al .
( 2014 ) and Lagache et al .
( 2018 ) .