Spagna Alessandro - Gaia
Gaia was proposed in 1993 and since then, many people have been involved in the Gaia mission, whether at ESA, at industry side or at one of the institutes involved in the Gaia data processing. The Gaia Data Processing and Analysis Consortium (DPAC) is a collaboration which consists of around 450 scientists and engineers.
The list of Gaia contributors presented here should not be considered a complete representation of the entire consortium. A more complete list of Gaia contributors that were involved in the creation of the Gaia catalogues can be obtained from the author lists of the Gaia Collaboration papers (for Gaia Data Release 1 see here, for Gaia Data Release 2 see here, for Gaia Early Data Release 3 see here). A history of contributions to the Gaia mission can be found from the acknowledgements given with each data release.
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INAF-Osservatorio Astrofisico di Torino
Alessandro Spagna is a staff astronomer, working in the astrometric group of the "Osservatorio Astrofisico di Torino".
As a member of CU3 he is responsible for the cross-matching algorithms that "count" all the sources observed by Gaia. He also collaborates with CU9 for the validation of the Gaia catalogue.
Alessandro got his degree in Physics in 1990 and his PhD in 1995, both at Torino University. He has worked in the final phase of the Hipparcos mission (binary stars) and he was involved, since the beginning, in the project for the construction of the Second Guide Star Catalogue (GSC-II).
His scientific interests include stellar statistics and galactic studies, mainly related to the formation and the chemo-dynamical evolution of the Milky Way.
Gaia people archive