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Astrometric precision tests on TESS data
Mario Gai, Alberto Vecchiato, Alberto Riva +5
Background. Astrometry at or below the micro-arcsec level with an imaging telescope assumes that the uncertainty on the location of an unresolved source can be an arbitrarily small…
Differential Astrometry with Gaia: Investigating relativistic light deflection close to Jupiter
U. Abbas, B. Bucciarelli, M. G. Lattanzi +5
In this paper we develop a differential astrometric framework that is appropriate for a scanning space satellite such as Gaia. We apply it to the first of the GAREQ fields, which i…
Post-Newtonian gravity and Gaia-like astrometry. Effect of PPN uncertainty on parallaxes
A. G. Butkevich, A. Vecchiato, B. Bucciarelli +3
Relativistic models of light propagation adopted for high-precision astrometry are based on the parametrised post-Newtonian formalism, which provides a framework for examining the…
On the principle of Astrometric Gravitational Wave Antenna
Mariateresa Crosta, Mario G. Lattanzi, Christophe Le Poncin-Lafitte +3
The direct detection of gravitational waves by ground-based optical interferometers has opened a new window in astronomy. Nevertheless, as these detectors are a combination of two…