ASTRA: ASTrometry and phase-Referencing Astronomy on the Keck interferometer
J. Woillez, R. Akeson, M. Colavita, J. Eisner, A. Ghez, J. Graham, L., Hillenbrand, R. Millan-Gabet, J. Monnier, J.-U. Pott, S. Ragland, P., Wizinowich, E. Appleby, B. Berkey, A. Cooper, C. Felizardo, J. Herstein, M., Hrynevych, O. Martin, D. Medeiros, D. Morrison, T. Panteleeva
TL;DR
ASTRA enhances the Keck Interferometer with advanced capabilities like self-phase referencing, dual-field phase referencing, and astrometry, enabling detailed studies of YSOs, AGNs, exoplanets, and galactic centers.
Contribution
This paper reports on the development and progress of ASTRA's dual-field and astrometric modes, expanding the scientific potential of the Keck Interferometer.
Findings
First high spectral resolution mode available to community
Progress in dual-field phase referencing capabilities
Advancements in astrometric measurement techniques
Abstract
ASTRA (ASTrometric and phase-Referencing Astronomy) is an upgrade to the existing Keck Interferometer which aims at providing new self-phase referencing (high spectral resolution observation of YSOs), dual-field phase referencing (sensitive AGN observations), and astrometric (known exoplanetary systems characterization and galactic center general relativity in strong field regime) capabilities. With the first high spectral resolution mode now offered to the community, this contribution focuses on the progress of the dual field and astrometric modes.
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