Palomar Testbed Interferometer: update
Abstract
The Palomar Testbed Interferometer is a long-baseline near- infrared interferometer operating at Palomar Observatory, CA. The interferometer has a maximum baseline of 110 m, 40-cm collecting apertures, and active fringe tracking. It also incorporates a dual-star architecture to enable cophasing and narrow-angle astrometry. We will discuss recent system improvements and engineering results. These include upgrades to allow for longer coherent integration times, H band operation, and cophasing using delay line feedforward. Recent engineering tests of astrometry in dual-star mode have shown a night-to-night repeatability of 100 µas on a bright test target. Several new observation planning tools have been developed, and data reduction tools have been automated to allow fully pipelined nightly reductions and archiving.
Additional Information
© 2000 Society of Photo-Optical Instrumentation Engineers (SPIE). PTI was developed by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Funding for the development of PTI was provided by NASA under its TOPS (Toward Other Planetary Systems) and ASEPS (Astronomical Studies of Extrasolar Planetary Systems) programs, and from the JPL Director's Discretionary Fund. Ongoing funding has been provided by NASA through its Origins Program and from the JPL Directors Research and Development Fund.Attached Files
Published - 452.pdf
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Additional details
- Eprint ID
- 91461
- Resolver ID
- CaltechAUTHORS:20181204-132723350
- NASA/JPL/Caltech
- JPL Director's Discretionary Fund
- JPL Research and Technology Development Fund
- Created
-
2018-12-05Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Series Name
- Proceedings of SPIE
- Series Volume or Issue Number
- 4006