Nonnormality of the errors and suspicious observations - Application to the Paris-astrolabe programme

Details Nonnormality of the errors and suspicious observations - Application to the Paris-astrolabe programme Nonnormality of the errors and suspicious observations - Application to the Paris-astrolabe programme

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26as...72..171b&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 72, no. 2, Feb. 1988, p. 171-192. Research supported by the

Statistics

Computation

3

Astrolabes, Binary Stars, Error Analysis, Radio Stars, Stellar Evolution, Astronomical Models, Computational Astrophysics, Least Squares Method

Scientific paper

An analysis of the Paris astrolabe reductions is carried out. By use of "influential diagnostic" statistics, the author identifies star observations that appear to have a disproportionate influence on the estimated model of reduction and thus appear to be suspect or atypical. He discusses their strong influence - in the reductions - on the estimated parameters, error variance, internal corrections and nonnormality of the residual distributions. Finally, some advice is given to overcome some difficulties entailed by the suspicious data in the current reductions of the observational programme, since suspicious data may also reveal some lack of fit of the usual reduction model.

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