The "Fundación Galileo Galilei - INAF, Fundación Canaria" (FGG) is a Spanish no-profit institution constituted by "INAF", the Italian Institute of Astrophysics.
The FGG's aim is to promote the astrophysical research, as foreseen in the international agreement of May 26, 1979 ("Acuerdo de Cooperación en Materia de Astrofísica, B.O.E. Núm.161, 6 Jul 1979"), by managing and running the Telescopio Nazionale Galileo (TNG), a 3.58m optical/infrared telescope located in the Island of San Miguel de La Palma, together with its scientific, technical and administrative facilities.
Transiting ultra-hot Jupiters are ideal candidates for studying the exoplanet atmospheres and their dynamics, particularly by means of high-resolution spectra with high signal-to-noise ratios. One such object is KELT-20b, orbiting the fast-rotating A-type star KELT-20.
In the framework of the Global Architecture of Planetary Systems (GAPS) project, two transits of KELT-20b were observed with GIARPS, with the purpose of studying the extension of the planetary atmosphere and any variation of the planetary atmospheric signal using the atmospheric Rossiter-McLaughlin effect and the line profile tomography.
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