A Caltech Library Service

Nulling at the Keck interferometer

Colavita, M. Mark and Serabyn, Gene and Wizinowich, Peter L. and Akeson, Rachel L. (2006) Nulling at the Keck interferometer. In: Advances in Stellar Interferometry. Proceedings of SPIE. No.6268. Society of Photo-Optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 626803. ISBN 9780819463333.

[img] PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


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 cancel the on-axis starlight and 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.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Wizinowich, Peter L.0000-0002-1646-442X
Akeson, Rachel L.0000-0001-9674-1564
Additional Information:© 2006 Society of Photo-Optical Instrumentation Engineers (SPIE). The Keck Interferometer is funded by the National Aeronautics and Space Administration (NASA). Observations presented were obtained at the W. M. Keck Observatory, which is operated as a scientific partnership among the California Institute of Technology, the University of California, and NASA. The Observatory was made possible by the generous financial support of the W. M. Keck Foundation. Part of this work was performed at the Jet Propulsion Laboratory, California Institute of Technology, and at the Michelson Science Center, California Institute of Technology, under contract with NASA.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
W. M. Keck FoundationUNSPECIFIED
Subject Keywords:Interferometry, Nulling, Keck
Series Name:Proceedings of SPIE
Issue or Number:6268
Record Number:CaltechAUTHORS:20191104-130057026
Persistent URL:
Official Citation:M. Mark Colavita, Gene Serabyn, Peter L. Wizinowich, and Rachel L. Akeson "Nulling at the Keck interferometer", Proc. SPIE 6268, Advances in Stellar Interferometry, 626803 (23 June 2006);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:99654
Deposited By: Tony Diaz
Deposited On:04 Nov 2019 21:11
Last Modified:16 Nov 2021 17:48

Repository Staff Only: item control page