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The treatment of HIPPARCOS observations of some peculiar double stars - Anomalous cases
Pannunzio, R.; Lattanzi, M. G.; Morbidelli, R. +2 more
We present an investigation on a few different types of double stars which, when observed by the Hipparcos satellite, will probably produce anomalous signals. Specifically, for these objects the automatic data reduction chain set up by the FAST Consortium will usually give inconsistent results. Thus, some new mathematical models have been consider…
Comparison of HIPPARCOS results obtained on different dates on the same great circle
Schrijver, Hans
The results on great circles that have been scanned by Hipparcos on dates separated by several months are compared. The differences in the abscissae, after correction for known proper motions and parallaxes show a noise and a systematic effect that correspond to expected inaccuracies in proper motions and parallaxes. Instrumental terms related to …
Reliability of the HIPPARCOS input catalogue tested by the 'first look'.
Arenou, F.; Crifo, F.; Gomez, A. +2 more
The reliability of the Input Catalogue is one of the keys for the success of the Hipparcos mission. As the Input Catalogue is a catalog made of very heterogeneous sources, many systematic reliability tests were conducted to eliminate errors on identifications, position, magnitude, etc. In March 1991, half of the Input Catalogue had already been ch…