Stringent absolute pointing acquisition and stability for high-precision astronomical imaging in space can be achieved via closed-loop control of fine guidance on-board systems (FGS), fed by specially customized guide star catalogs (GSC). The prescriptions for the realization of FGS GSCs are driven by the FGS instrumental characteristics and the required observational accuracy, while their fulfillment ultimately depends on the properties of the reference catalogs at disposal. I will review how the GSC of the FGS on-board the ESA Euclid satellite has been constructed on the base of such criteria, highlighting some general guidelines and performance assessment tests.

Bio:

Beatrice Bucciarelli is a senior research astronomer of the Italian National Institute of Astrophysics (INAF), at the Astrophysical Observatory of Turin (OATo). Her main scientific interests are in the use of high-accuracy astrometry for the study of the Milky Way in the context of local Cosmology. She started working in the field of space astrometry by participating in the reduction and evaluation of data from the ESA HIPPARCOS satellite, and also in the astrometric and photometric calibration pipeline of the Fine Guidance Sensors on board the Hubble Space Telescope. She gained experience in large field astrometry with Schmidt telescopes, and contributed with innovative techniques to the astrometric and photometric recalibration of the HST Guide Star Catalog. She is actually member of the DPAC consortium for the data reduction of the ESA cornerstone mission Gaia, her main involvement being on the numerical and statistical aspects of the construction of a celestial reference frame at the micro-arcsecond level accuracy.