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Nulling at the Keck interferometer

Show simple item record Colavita, M. Mark Serabyn, Gene Wizinowich, Peter L. Akeson, Rachel L. 2006-10-25T21:47:45Z 2006-10-25T21:47:45Z 2006-05-24
dc.identifier.citation SPIE Conference on Astronomical Telescopes and Instrumentation, Orlando, Florida, May 24-31, 2006. en
dc.identifier.clearanceno 06-1411
dc.description.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. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 109226 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2006. en
dc.subject interferometry en
dc.subject nulling en
dc.subject Keck telescopes en
dc.subject Keck Interferometer
dc.title Nulling at the Keck interferometer en
dc.type Preprint en

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