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ASTRA: ASTrometry and phase-Referencing Astronomy on the Keck interferometer
J. Woillez, R. Akeson, M. Colavita +24
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 o…
First faint dual-field phase-referenced observations on the Keck interferometer
Julien Woillez, Peter Wizinowich, Rachel Akeson +19
Ground-based long baseline interferometers have long been limited in sensitivity by the short integration periods imposed by atmospheric turbulence. The first observation fainter t…
Disentangling Confused Stars at the Galactic Center with Long Baseline Infrared Interferometry
Jordan M. Stone, J. A. Eisner, J. D. Monnier +4
We present simulations of Keck Interferometer ASTRA and VLTI GRAVITY observations of mock star fields in orbit within ~50 milliarcseconds of Sgr A*. Dual-field phase referencing te…
FIRST, a fibered aperture masking instrument. I. First on-sky test results
E. Huby, G. Perrin, F. Marchis +12
In this paper we present the first on-sky results with the fibered aperture masking instrument FIRST. Its principle relies on the combination of spatial filtering and aperture mask…