SIMBAD references

1999AJ....117..483A - Astron. J., 117, 483-491 (1999/January-0)

Early radio positions of stars.

ANDREI A.H., ASSAFIN M., PULIAEV S.P., VIEIRA MARTINS R., JILINSKI E.G. and BARTHOLOMEU E SILVA W.

Abstract (from CDS):

Early radio positions for a sample of 100 Hipparcos stars, three Tycho-only stars, and nine radio stars with optical positions referred to the Hipparcos/ICRS frame are analyzed. The optical proper motions are used to compare the optical and radio positions. From an original sample of 247 radio positions for the above 112 stars, a set of 220 shows coincidence between the optical and radio centers of emission closer than 500 mas. This set is analyzed for systematic departures between the optical and radio positions. A smaller subset of 136 early radio positions for 72 stars show radio-minus-optical offsets smaller than 100 mas and are useful for monitoring of the spin of the Hipparcos frame.

Abstract Copyright:

Journal keyword(s): Astrometry

Simbad objects: 83

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