The Westerbork HALOGAS Survey: Data Release 1

<strong>The Westerbork HALOGAS Survey: Data Release 1 (version 2)</strong> The Westerbork Hydrogen Accretion in LOcal GAlaxieS (HALOGAS) Survey comprises deep neutral hydrogen (HI) 21-cm emission line observations of 24 nearby galaxies, along with ancillary data products such as deep optical imaging, radio continuum images, and single-dish HI data. This first data release (<strong>HALOGAS-DR1</strong>) provides the following HI data products in FITS format, for each of the 24 galaxies: High resolution (~15") data products Data cube: &lt;galaxy_name&gt;-HR-cube.fits Moment-0 (integrated intensity): &lt;galaxy_name&gt;-HR_mom0m.fits Column density: &lt;galaxy_name&gt;-HR_coldens.fits Moment-1 (average velocity): &lt;galaxy_name&gt;-HR_mom1m.fits Low resolution (~30") data products Data cube: &lt;galaxy_name&gt;-LR-cube.fits Moment-0 (integrated intensity): &lt;galaxy_name&gt;-LR_mom0m.fits Column density: &lt;galaxy_name&gt;-LR_coldens.fits Moment-1 (average velocity): &lt;galaxy_name&gt;-LR_mom1m.fits Moment maps were generated with the SoFiA source finding package. <strong>Changes from version 1</strong> A substantial error was identified with the velocity axis of the HI cubes for NGC 4448, leading to a large bulk offset from the true systemic velocity of the galaxy. Version 2 corrects this error in the cubes and the corresponding moment-1 (average velocity) images for NGC 4448. The data products for all other galaxies are unmodified from version 1. <strong>Acknowledgements</strong> If you make use of these data products in any publication or presentation, we kindly ask you to cite the following paper(s): Primary HALOGAS reference: Heald et al. (2011) Additional reference for NGC 891: Oosterloo et al. (2007) Additional reference for NGC 2403: Fraternali et al. (2002) and to include the following acknowledgement: <em>This research made use of data from WSRT HALOGAS-DR1. The Westerbork Synthesis Radio Telescope is operated by ASTRON (Netherlands Institute for Radio Astronomy) with support from the Netherlands Foundation for Scientific Research NWO.</em>