Catalog for The MDW Hα Sky Survey: Data Release 1

V2: Updated all FITS files for mean catalogs . A few random fields were missing, and one file was even corrupted. Alas...

Here, we upload the source catalogs for Data Release 1 (DR1) of the MDW Hα Sky Survey. These catalogs spans the Northern Sky over 2116 fields, and is catalog-matched to both the Pan-STARRS DR1 catalog and the IGAPS survey of the Galactic plane. For each field, we include point source catalogs for both individual exposures (20 minutes long; irregularly cadenced; 6-12 exposures per field), and the mean-combined stack. The stack catalogs span ~40 million sources.

For convenience, we include a list of field centers in RA/Dec (J200) and in units of degrees. Each field is 3.6x3.6 degrees in 4k resolution, with a 3.2'' pixel scale. Each field also overlaps by 11'. We also include a document outlining the catalog columns.

This catalog supplements Aftab, Zhang et. al. (2025).

The complete DR1 dataset can be accessed here: https://mdw.astro.columbia.edu. Any use of DR1 data (including the source catalog) should include the following acknowledgement:

Funding for the MDW Survey Project has been provided by the Michele and David Mittelman Family Foundation. David R. Mittelman, Dennis di Cicco, and Sean Walker are founding members of the survey and made possible the acquisition and reduction of the data. Columbia University Astronomy Department is responsible for the final data reduction, calibration, and dissemination of the survey data. All commercial rights for the use of the data are reserved.