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Confirmation of Errors in Hipparcos Parallaxes from HST/FGS Astrometry of the Pleiades
David R. Soderblom, Ed Nelan, G. Fritz Benedict +4
We present absolute trigonometric parallaxes and relative proper motions for three members of the Pleiades star cluster, obtained with HST's Fine Guidance Sensor 1r, a white-light…
Lick Northern Proper Motion Program. III. Lick NPM2 Catalog
Robert B. Hanson, Arnold R. Klemola, Burton F. Jones +1
The Lick Northern Proper Motion (NPM) program, a two-epoch (1947-1988) photographic survey of the northern two-thirds of the sky (Dec. > -23 deg), has measured absolute proper moti…
Chandra X-ray observations of Young Clusters II. Orion Flanking Fields Data
Solange V. Ramirez, Luisa Rebull, John Stauffer +7
We present results of Chandra observations of two flanking fields (FF) in Orion, outside the Orion Nebula Cluster (ONC). The observations were taken with the ACIS-I camera with an…
Chandra X-ray observations of Young Clusters I. NGC2264 Data
Solange V. Ramirez, Luisa Rebull, John Stauffer +7
We present results of a Chandra observation of a field in NGC 2264. The observations were taken with the ACIS-I camera with an exposure time of 48.1 ks. We present a catalog of 263…