Proper motions in NGC 1647 (Geffer+ 1996)

Details Proper motions in NGC 1647 (Geffer+ 1996) Proper motions in NGC 1647 (Geffer+ 1996)

Sep 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ycat..41180277g&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/118/277. Originally published in: 1996A&AS..118..277G

Astronomy and Astrophysics

Astronomy

Clusters: Open, Proper Motions

Scientific paper

The astrometric accuracy of triple image Carte du Ciel plates has been analysed using plates of the open cluster NGC 1647. A new multithreshold technique was used for the treatment of the triple image plates. Accuracies ranging from 100mas to 200mas were found. We determined proper motions with a median accuracy of 1.6mas/a for 2220 stars in the field of NGC 1647. The membership probabilities of stars in the cluster region agree very well with the data of Francic (1989). Due to a significant difference of the proper motions of SZ Tau and the cluster members, SZ Tau seems not to be a member of NGC 1647. (1 data file).

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