Computer Science
Scientific paper
Nov 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phdt..........g&link_type=abstract
PhD Thesis (1995)
Computer Science
Scientific paper
Since 1987 the stellar declinations from the Fifth fundamental catalogue (FK5) were re-observed with the Photographic vertical circle (PVC) of the Pulkovo observatory. About 6000 observations of 1220 stars have been reduced. Instrumental systematic errors (tube flexure, circle errors, chromatic refraction, focal scale, etc.) have been calibrated by original methods independently from the observations with accuracy of 0.04 arcsec for zenith distances down to 60 degs. The accuracy of observation in zenith is 0.16 arcsec. Several hundreds of declinations are obtained with accuracy better than 0.05 arcsec. Therefore, the proper motions (in declination) of the stars can be obtained with accuracy at the level of 0.001 arcsec/year. We have found some evidence of systematic errors in the FK5. A final absolute catalogues will be completed using observations of Mars and Jupiter which have been carried out since 1988.
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