VISION: A Six-Telescope Fiber-Fed Visible Light Beam Combiner for the Navy Precision Optical Interferometer

Abstract

Visible-light long baseline interferometry holds the promise of advancing a number of important applications in fundamental astronomy, including the direct measurement of the angular diameters and oblateness of stars, and the direct measurement of the orbits of binary and multiple star systems. To advance, the field of visible-light interferometry requires development of instruments capable of combining light from 15 baselines (6 telescopes) simultaneously. The Visible Imaging System for Interferometric Observations at NPOI (VISION) is a new visible light beam combiner for the Navy Precision Optical Interferometer (NPOI) that uses single-mode fibers to coherently combine light from up to six telescopes simultaneously with an image-plane combination scheme. It features a photometric camera for calibrations and spatial filtering from single-mode fibers with two Andor Ixon electron multiplying CCDs. This paper presents the VISION system, results of laboratory tests, and results of commissioning on-sky observations. A new set of corrections have been determined for the power spectrum and bispectrum by taking into account non-Gaussian statistics and read noise present in electron-multipying CCDs to enable measurement of visibilities and closure phases in the VISION post-processing pipeline. The post-processing pipeline has been verified via new on-sky observations of the O-type supergiant binary $\zeta$ Orionis A, obtaining a flux ratio of $2.18\pm 0.13$ mag with a position angle of $223.9\pm 1.0^{\circ }$ and separation $40.6\pm 1.8$ mas over 570-750 nm, in good agreement with expectations from the previously published orbit.

arXiv commentAccepted for publication in PASP 12/31/2015; 50 pages, 18 figures

References in corpus (46)

• The SIMBAD astronomical database
• First Results from the CHARA Array. II. A Description of the Instrument
• Imaging the Surface of Altair
• Interferometric Observations of Rapidly Rotating Stars
• First Resolved Images of the Eclipsing and Interacting Binary Beta Lyrae
• Gravity darkening in rotating stars
• Fundamental Properties of Stars using Asteroseismology from Kepler & CoRoT and Interferometry from the CHARA Array
• The spinning-top Be star Achernar from VLTI-VINCI
• Vega is a rapidly rotating star
• Interferometric radii of bright Kepler stars with the CHARA Array: θ Cygni and 16 Cygni A and B
• Radiative hydrodynamics simulations of red supergiant stars: I. interpretation of interferometric observations
• Imaging the spotty surface of Betelgeuse in the H band
• Colder and Hotter: Interferometric imaging of β Cassiopeiae and α Leonis
• Radiative hydrodynamics simulations of red supergiant stars: II. simulations of convection on Betelgeuse match interferometric observations
• Resolving Vega and the inclination controversy with CHARA/MIRC
• Self-consistent 2D models of fast rotating early-type star
• Radiative hydrodynamics simulations of red supergiant stars. III. Spectro-photocentric variability, photometric variability, and consequences on Gaia measurements
• The radius and mass of the close solar twin 18 Sco derived from asteroseismology and interferometry
• γ^2 Velorum: Orbital Solution and Fundamental Parameter Determination with SUSI
• Masses, Luminosities, and Orbital Coplanarities of the mu Orionis Quadruple Star System from PHASES Differential Astrometry
• Three-dimensional interferometric, spectrometric, and planetary views of Procyon
• Optical Interferometry of early-type stars with PAVO@CHARA. I. Fundamental stellar properties
• Validation of the Exoplanet Kepler-21b using PAVO/CHARA Long-Baseline Interferometry
• Improving the surface brightness-color relation for early-type stars using optical interferometry
• CHARA/MIRC observations of two M supergiants in Perseus OB1: temperature, Bayesian modeling, and compressed sensing imaging
• Dynamical mass of the O-type supergiant in Zeta Orionis A
• The Algol triple system spatially resolved at optical wavelengths
• PHASES Differential Astrometry and the Mutual Inclination of the V819 Herculis Triple Star System
• Navy Prototype Optical Interferometer Imaging of Line Emission Regions of beta Lyrae Using Differential Phase Referencing
• High Frame-rate Imaging Based Photometry, Photometric Reduction of Data from Electron-multiplying Charge Coupled Devices (EMCCDs)
• A new determination of the orbit and masses of the Be binary system delta Scorpii
• NPOI Observations of the Exoplanet Host kappa Coronae Borealis and Their Implications for the Star's and Planet's Masses and Ages
• Asymmetric Surface Brightness Distribution of Altair Observed with the Navy Prototype Optical Interferometer
• NPOI Measurements of Ten Stellar Oscillators
• PHASES High Precision Differential Astrometry of delta Equulei
• Detection noise bias and variance in the power spectrum and bispectrum in optical interferometry
• Interferometry of $\epsilon$ Aurigae: Characterization of the asymmetric eclipsing disk
• Tests of stellar model atmospheres by optical interferometry III: NPOI and VINCI interferometry of the M0 giant gamma Sge covering 0.5 - 2.2 microns
• Low light level CCDs and visibility parameter estimation
• The radius and other fundamental parameters of the F9 V star beta Virginis
• Limits to Tertiary Astrometric Companions in Binary Systems
• Diameters of delta Cephei and eta Aquilae Measured with the Navy Prototype Optical Interferometer
• Optical interferometric observations of Theta 1 Orionis C from NPOI and implications for the system orbit
• Detecting the Companions and Ellipsoidal Variations of RS CVn Primaries: II. omicron Draconis, a Candidate for Recent Low-Mass Companion Ingestion
• The PHASES Differential Astrometry Data Archive IV: The Triple Star Systems 63 Gem A and HR 2896
• The peculiar fast-rotating star 51 Oph probed by VEGA/CHARA

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