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Table · dataset · 2016

1103 parallaxes and proper motions from URAT

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We present 1103 trigonometric parallaxes and proper motions from the United States Naval Observatory Robotic Astrometric Telescope (URAT) observations taken at the Naval Observatory Flagstaff Station (NOFS) over a three-year period from 2012 April to 2015 June covering the entire sky north of about -10{deg} decl.

Description

We selected two samples: previously suspected nearby stars from known photometric distances and stars showing a large, significant parallax signature in URAT epoch data without any prior selection criteria.

All systems presented in this paper have an observed parallax {>=}40mas with no previous published trigonometric parallax. The formal errors on these weighted parallax solutions are mostly between 4 and 10mas. This sample gives a significant (of the order of 50%) increase to the number of known systems having a trigonometric parallax to be within 25pc of the Sun (without applying Lutz-Kelker bias corrections).

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A few of these are found to be within 10pc. Many of these new nearby stars display a total proper motion of less than 200mas/yr. URAT parallax results have been verified against Hipparcos and Yale data for stars in common.

The publication of all significant parallax observations from URAT data is in preparation for CDS.

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