Phase-referenced Stellar Interferometry at the Palomar Testbed Interferometer

Details Phase-referenced Stellar Interferometry at the Palomar Testbed Interferometer Phase-referenced Stellar Interferometry at the Palomar Testbed Interferometer

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aj....125.1623l&link_type=abstract

The Astronomical Journal, Volume 125, Issue 3, pp. 1623-1628.

Astronomy and Astrophysics

Astronomy

10

Instrumentation: Interferometers, Techniques: Interferometric

Scientific paper

We discuss implementation and testing of phase referencing at the Palomar Testbed Interferometer. A new instrument configuration provides a coherent integration of 10 or 20 ms on a bright star while stabilizing the fringe phase of a nearby (20") and faint visual companion, allowing coherent integration times of at least 250 ms. Observations have been made of several visual binaries, including 16 Cyg AB (mK=4.5 and mK=4.6) and HD 173648/49 (mK=4.3 and mK~5) to test the performance of the technique. These measurements also demonstrate that phase-referenced visibility measurements can be calibrated at the level of 3%-7%.

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