Star catalog position and proper motion corrections in asteroid astrometry II: The Gaia era
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DOI: 10.1016/j.icarus.2014.07.033
Abstract: Abstract We provide a scheme to correct asteroid astrometric observations for star catalog systematic errors due to inaccurate star positions and proper motions. As reference we select the most accurate stars in the PPMXL catalog,… read more here.
Keywords: catalog; star catalog; astrometry; star ... See more keywords
Optimality of the maximum likelihood estimator in astrometry
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DOI: 10.1051/0004-6361/201732537
Abstract: The problem of astrometry is revisited from the perspective of analyzing the attainability of well-known performance limits (the Cramer-Rao bound) for the estimation of the relative position of light-emitting (usually point-like) sources on a CCD-like… read more here.
Keywords: weighted least; estimator; maximum likelihood; likelihood estimator ... See more keywords
Development of the Warm Astrometric Mask for MICADO Astrometry Calibration
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DOI: 10.1088/1538-3873/ab0c40
Abstract: The achievement of $\mu$arcsec relative astrometry with ground-based, near infrared, extremely large telescopes requires a significant endeavour of calibration strategies. In this paper we address the removal of instrument optical distortions coming from the ELT… read more here.
Keywords: mask; micado; calibration; development warm ... See more keywords
Cosmology and Astrometry
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DOI: 10.1134/s1063772918120132
Abstract: It has recently become clear that the potential role of astrometry in cosmological studies has been underestimated. Some areas of cosmology that should be investigated using astrometrical methods are discussed. This paper is based on… read more here.
Keywords: cosmology; cosmology astrometry; astrometry; astronomy ... See more keywords