Home Scientific Departments Galaxies and Cosmology Research groups Gaia Gaia projects The Gaia astrophysical parameters inference system (Apsis) chain - "the data analysis system to classify Gaia objects and to infer their astrophysical properties using the satellite's data (Coryn et al. 2013)" The Gaia astrophysical parameters inference system (Apsis) chain - "the data analysis system to classify Gaia objects and to infer their astrophysical properties using the satellite's data (Coryn et al. 2013)" DSC Discrete Source Classifier [more] GSP-Phot Generalized Stellar Parametrizer [more] MSC Multiple Star Classifier [more] Ulysses A simple BP/RP simulator to simulate end-of-mission Gaia spectra. [more] Validation Validate Science Outputs from APSIS Modules [more] CU9 Hybrid Catalogs [more]