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A global correction to PPMXL proper motions

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In this paper we notice that extragalactic sources seem to have non-zero proper motions in the PPMXL proper motion catalog. We collect a large, all-sky sample of extragalactic objects and fit their reported PPMXL proper motions to an ensemble of spherical harmonics in magnitude shells. A magnitude d...

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Bibliographic Details
Main Authors: Vickers, John J. (Author) , Röser, Siegfried (Author) , Grebel, Eva K. (Author)
Format: Article (Journal) Chapter/Article
Language:English
Published: 2016
In: Arxiv

Online Access:Verlag, kostenfrei, Volltext: http://arxiv.org/abs/1602.08868
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Author Notes:John J. Vickers, Siegfried Röser, Eva K. Grebel

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