A critical discussion on parametric and nonparametric regression methods applied to Hipparcos-FK5 residuals
Dept. Matematicas, Universidad Jaume I, Campus de Riu Sec, 12071 Castellon, Spain e-mail: marco;firstname.lastname@example.org
2 Dept. Matematica Aplicada. Universidad politecnica de Valencia ETSII Valencia, Spain e-mail: email@example.com
Corresponding author: F. J. Marco, firstname.lastname@example.org
Accepted: 22 January 2004
In this paper we present an analysis of the differences between the Hipparcos and FK5 catalogues. We study parametric and nonparametric methods with two main objectives: first, to determine whether or not there is a pure rotation between the two catalogues, and to decide which model best represents the residuals; second, to give a practical formulation to reduce positions between the two systems at any point on the celestial sphere.
Key words: astrometry / catalogs / reference systems
© ESO, 2004