Are double star observations the most suspicious ones in the Paris Astrolabe programme?

Details Are double star observations the most suspicious ones in the Paris Astrolabe programme? Are double star observations the most suspicious ones in the Paris Astrolabe programme?

Mar 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.142..185b&link_type=abstract

(IAU, Colloquium on Wide Components in Double and Multiple Stars, 97th, Brussels, Belgium, June 8-13, 1987) Astrophysics and Spa

Astronomy and Astrophysics

Astrophysics

1

Astrolabes, Double Stars, Stellar Motions, Astrometry, Universal Time

Scientific paper

Influential diagnostic statistics are used to identify star observations that have a disproportionate influence on the estimated model of the usual Paris Astrolabe reductions. An examination, over two homogeneous test periods, of ordinary least-squares residuals of the Paris Astrolabe data shows that nine stars of the program are atypical, with the most suspicious being the double star Nr 2889. The present work has application to the determination of the severity of observational errors, and reveals difficulties in observing double stars and high magnitude stars.

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