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Issue A&A
Volume 418, Number 3, May II 2004
Page(s) 1159 - 1170
Section Celestial mechanics and astrometry
DOI http://dx.doi.org/10.1051/0004-6361:20034441



A&A 418, 1159-1170 (2004)
DOI: 10.1051/0004-6361:20034441

A critical discussion on parametric and nonparametric regression methods applied to Hipparcos-FK5 residuals

F. J. Marco1, M. J. Martínez2 and J. A. López1

1  Dept. Matematicas, Universidad Jaume I, Campus de Riu Sec, 12071 Castellon, Spain
    e-mail: marco;lopez@mat.uji.es
2  Dept. Matematica Aplicada. Universidad politecnica de Valencia ETSII Valencia, Spain
    e-mail: mjmartin@mat.upv.es

(Received 3 October 2003 / Accepted 22 January 2004 )

Abstract
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

Offprint request: F. J. Marco, marco@mat.uji.es




© ESO 2004


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