The Magdalena Ridge Interferometer Fringe Tracker

Details The Magdalena Ridge Interferometer Fringe Tracker The Magdalena Ridge Interferometer Fringe Tracker

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21544113j&link_type=abstract

American Astronomical Society, AAS Meeting #215, #441.13; Bulletin of the American Astronomical Society, Vol. 42, p.403

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Scientific paper

We report on the status of the Magdalena Ridge Observatory Interferometer fringe tracker. The instrument design is complete, and is under construction at MRO. It consists of a dedicated, near-IR, fringe tracking beam combiner and spectrographs. It will utilize the "Y" geometry of the array to stabilize fringes on shorter "nearest neighbor" baselines, allowing for increased integration times on the longer baselines and the buildup of signal to noise in the science instrument. The beam combiner has been designed to accommodate light from a maximum of ten telescopes (three in each array arm, one at the "Y" vertex), but can operate with fewer without having to change the overall layout. A single spectrograph will multiplex up to five nearest neighbor combinations onto a single detector. Identical spectrographs are located at both combiner outputs to simultaneously sample combination pairs that are π radians out of phase with respect to one another.

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