Toward Cosmicflows-4: The HI data catalog

Aims. In this study, we present an update of a compilation line width measurements neutral atomic hydrogen (H I ) galaxy spectra at 21 cm wavelength. Our All Digital HI (ADHI) catalog consists the previous release augmented with our new H observations and analysis archival data. This study provides required information to measure distances spiral galaxies through application Tully-Fisher (TF) relation. Methods. We conducted Green Bank telescope (GBT) reprocessed obtained Nançay radiotelescope by Interstellar Baryons Legacy Extragalactic Survey Kinematics Local Universe collaborations analyzed recently published full completion Arecibo Fast ALFA (ALFALFA) 100% survey in order identify good quality measurements. Results. paper adds data adequate for TF use 385 observed GBT, 889 from spectra, 1515 rescaled ALFALFA spectra. total, 1274 ADHI catalog. Today, database contains 18 874 galaxies, which 15 433 have use. The final goal is compute accurate will be included next generation peculiar velocities catalog: Cosmicflows-4.