An empirical model of the Gaia DR3 selection function

Precomputed maps of the M10 parameter used to predict the completeness of the Gaia DR3 source catalogue. allsky_M10_hpx7.hdf5 is a tessellation of the whole sky in Galactic nested healpix scheme of order 7. allsky_uniq_10.fits uses an adaptive resolution and is based on the 'uniq' numbering of healpix tiles. Regions of higher density use a finer resolution, up to order 10, chosen so that every tile contains a minimum of twenty sources to compute M10 from. Paper: https://ui.adsabs.harvard.edu/abs/2023A%26A...669A..55C/abstract Tutorial using the GaiaUnlimited python package to query these maps: https://github.com/gaia-unlimited/gaiaunlimited/blob/main/docs/notebooks/dr3-empirical-completeness.ipynb Documentation for the GaiaUnlimited package: https://gaiaunlimited.readthedocs.io/en/latest/