Astron. J., 160, 158-158 (2020/October-0)
MIRC-X: a highly sensitive six-telescope interferometric imager at the CHARA Array.
ANUGU N., LE BOUQUIN J.-B., MONNIER J.D., KRAUS S., SETTERHOLM B.R., LABDON A., DAVIES C.L., LANTHERMANN C., GARDNER T., ENNIS J., JOHNSON K.J.C., TEN BRUMMELAAR T., SCHAEFER G. and STURMANN J.
Abstract (from CDS):
Michigan InfraRed Combiner-eXeter (MIRC-X) is a new highly sensitive six-telescope interferometric imager installed at the CHARA Array that provides an angular resolution equivalent of up to a 330 m diameter baseline telescope in J- and H-band wavelengths (λ/2B ∼0.6 mas). We upgraded the original Michigan InfraRed Combiner (MIRC) instrument to improve sensitivity and wavelength coverage in two phases. First, a revolutionary sub-electron noise and fast-frame-rate C-RED ONE camera based on an SAPHIRA detector was installed. Second, a new-generation beam combiner was designed and commissioned to (i) maximize sensitivity, (ii) extend the wavelength coverage to J band, and (iii) enable polarization observations. A low-latency and fast-frame-rate control software enables high-efficiency observations and fringe tracking for the forthcoming instruments of the CHARA Array. Since mid-2017, MIRC-X has been offered to the community and has demonstrated best-case H-band sensitivity down to 8.2 correlated magnitude. MIRC-X uses single-mode fibers to coherently combine the light from six telescopes simultaneously with an image-plane combination scheme and delivers a visibility precision better than 1%, and closure phase precision better than 1°. MIRC-X aims at (i) imaging protoplanetary disks, (ii) detecting exoplanets with precise astrometry, and (iii) imaging stellar surfaces and starspots at an unprecedented angular resolution in the near-infrared. In this paper, we present the instrument design, installation, operation, and on-sky results, and demonstrate the imaging capability of MIRC-X on the binary system ι Peg. The purpose of this paper is to provide a solid reference for studies based on MIRC-X data and to inspire future instruments in optical interferometry.
© 2020. The American Astronomical Society. All rights reserved.
Very long baseline interferometry - Michelson interferometry - Astronomical detectors - Binary stars - Astronomy data reduction - Astronomical instrumentation - Astronomy data acquisition - Interferometers - Young stellar objects - Exoplanet detection methods - Starspots - Astronomy data analysis
View the reference in ADS
To bookmark this query, right click on this link: simbad:2020AJ....160..158A and select 'bookmark this link' or equivalent in the popup menu