Preliminary measurements of star positions with the Mark III stellar interferometer

Details Preliminary measurements of star positions with the Mark III stellar interferometer Preliminary measurements of star positions with the Mark III stellar interferometer

Apr 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95.1269m&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 95, April 1988, p. 1269-1277.

Astronomy and Astrophysics

Astronomy

16

Astrometry, Astronomical Coordinates, Interferometry, Star Trackers, Optical Thickness, Refractivity

Scientific paper

Preliminary astrometric measurements with the Mark III optical stellar interferometer using a 12.005 m north-south baseline were made during seven nights in November 1986. A total of 22 stars were observed over large angles in a 3000-A wide band centered at 7000 A. As expected, the estimated precision of the relative positions increases with hour-angle coverage. For the ten stars observed over at least 90 deg of hour angle, the right ascensions are consistent at the 5 ms of time (1sigma) level, while the uncertainties in declination are at the 22 mas (1sigma) level. With this small data set, the question of systematic errors cannot be fully examined. A discussion of observational techniques, errors, limitations of this system, and future plans is presented.

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