Published June 21, 2023 | Version v1
Dataset Open

An empirical model of the Gaia DR3 selection function

  • 1. Max Planck Institute for Astronomy


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.


Tutorial using the GaiaUnlimited python package to query these maps:

Documentation for the GaiaUnlimited package:


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Additional details

Related works

Is documented by
Journal article: 10.1051/0004-6361/202244784 (DOI)
Preprint: 10.48550/arXiv.2208.09335 (DOI)


GaiaUnlimited – Who is In, and Who is Not? Determining the Gaia Survey Selection Function 101004110
European Commission


  • Cantat-Gaudin et al. (2023) bibcode:2023A&A...669A..55C arXiv:2208.09335