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Ground-based astrometry with wide field imagers: V. Application to near-infrared detectors: HAWK-I@VLT/ESO

Libralato, M; Bellini, A; Bedin, L R; Piotto, G; Platais, Imants; Kissler-Patig, Martin; Milone, Antonino

Description

High-precision astrometry requires accurate point-spread function modeling and accurate geometric-distortion corrections. This paper demonstrates that it is possible to achieve both requirements with data collected at the high acuity wide-field K-band imager (HAWK-I), a wide-field imager installed at the Nasmyth focus of UT4/VLT ESO 8 m telescope. Our final astrometric precision reaches ~3 mas per coordinate for a well-exposed star in a single image with a systematic error less than 0.1 mas. We...[Show more]

CollectionsANU Research Publications
Date published: 2014
Type: Journal article
URI: http://hdl.handle.net/1885/73782
Source: Astronomy and Astrophysics
DOI: 10.1051/0004-6361/201322059

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