Ground-based CCD astrometry with wide field imagers. IV. An improved Geometric Distortion Correction for the Blue prime-focus Camera at the LBT
arXiv:1005.0848 · doi:10.1051/0004-6361/200913783
Abstract
High precision astrometry requires an accurate geometric distortion solution. In this work, we present an average correction for the Blue Camera of the Large Binocular Telescope which enables a relative astrometric precision of ~15 mas for the B_Bessel and V_Bessel broad-band filters. The result of this effort is used in two companion papers: the first to measure the absolute proper motion of the open cluster M67 with respect to the background galaxies; the second to decontaminate the color-magnitude diagram of M67 from field objects, enabling the study of the end of its white dwarf cooling sequence. Many other applications might find this distortion correction useful.
arXiv comment13 pages, 11 figures, 4 tables. accepted for publication on Astronomy and Astrophysics
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- Dynamical Analysis of Nearby ClustErs. Automated astrometry from the ground: precision proper motions over wide field
- A Deep View of a Fossil Relic in the Galactic Bulge: The Globular Cluster HP1
- Ground-based astrometry with wide field imagers. V. Application to near-infrared detectors: HAWK-I@VLT/ESO
- Variable stars in two open clusters within the Kepler 2-Campaign-0 field: M 35 and NGC 2158
- Absolute proper motion of the Galactic open cluster M67
- High-precision astrometry with VVV. I. An independent reduction pipeline for VIRCAM@VISTA
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- Astrometry with the Wide-Field InfraRed Space Telescope
- A bag of tricks: Using proper motions of Galactic stars to identify the Hercules ultra-faint dwarf galaxy members
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- A geometric distortion solution specifically for historical observations and its implementation
- Demonstration of Plate Analysis, an algorithm for precise relative astrometry