Optimal proper motion measurements with the Wide Field and Planetary Camera

Details Optimal proper motion measurements with the Wide Field and Planetary Camera Optimal proper motion measurements with the Wide Field and Planetary Camera

1998-09-07

arxiv.org/abs/astro-ph/9809070v1

Astronomy and Astrophysics

Astrophysics

12 pages, 2 figures, accepted for publication in the AJ

Scientific paper

An optimal maximum-likelihood technique for computing point-source image centroids from many, slightly offset, CCD frames is presented. The method is especially useful for measuring stellar proper motions from data taken with the Wide Field and Planetary Camera aboard the HST, and also provides a means to identify very compact non-stellar sources. We work though the example problem of obtaining image centroids of objects in the Hubble Deep Field.

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