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Please use this identifier to cite or link to this item: http://hdl.handle.net/2014/39855

Title: Nulling at the Keck interferometer
Authors: Colavita, M. Mark
Serabyn, Gene
Wizinowich, Peter L.
Akeson, Rachel L.
Keywords: interferometry
nulling
Keck telescopes
Keck Interferometer
Issue Date: 24-May-2006
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2006.
Citation: SPIE Conference on Astronomical Telescopes and Instrumentation, Orlando, Florida, May 24-31, 2006.
Abstract: The nulling mode of the Keck Interferometer is being commissioned at the Mauna Kea summit. The nuller combines the two Keck telescope apertures in a split-pupil mode to both cancel the on-axis starlight and to coherently detect the residual signal. The nuller, working at 10 um, is tightly integrated with the other interferometer subsystems including the fringe and angle trackers, the delay lines and laser metrology, and the real-time control system. Since first 10 um light in August 2004, the system integration is proceeding with increasing functionality and performance, leading to demonstration of a 100:1 on-sky null in 2005. That level of performance has now been extended to observations with longer coherent integration times. An overview of the overall system is presented, with emphasis on the observing sequence, phasing system, and differences with respect to the V2 system, along with a presentation of some recent engineering data.
URI: http://hdl.handle.net/2014/39855
Appears in Collections:JPL TRS 1992+

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