The Keck Interferometer Nuller (KIN): configuration, measurement approach, and first results

Serabyn, Eugene; Appleby, E.; Bell, J.; Booth, A. J.; Chin, Jason C. Y.; Colavita, M. M.; Crawford, S.; Creech‐Eakman, M. J.; Dahl, W.; Fanson, James L.; Garcia, J.; Gathright, J.; Hovland, E.; Hrynevych, M.; Koresko, C.; Ligon, R.; Mennesson, Bertrand; Moore, James D.; Palmer, Dean L.; Panteleeva, T.; Paine, Chris; Ragland, Sam; Reder, Leonard J.; Saloga, T.; Smythe, R.; Tyau, C.; Tsubota, K.; Vasisht, Gautam; Wetherell, Ed; Wizinowich, Peter; Woillez, J.

doi:10.1117/12.618228

Cited by 5 publications

(6 citation statements)

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“…Other references (1,5,6) provide considerable detail on the interferometer beamline. The following narrative discusses those elements which are different from the original V 2 implementation.…”

Section: Beamline Updatementioning

confidence: 99%

“…As described in detail elsewhere, 5 and illustrated in Figure 3, star light is split between 2 and 10 um prior to the eight interferometer delay lines, and a pair of delay lines is used by each of the two nullers and each of the two 2 um fringe trackers 17 for OPD control. The 2 um phasing system employs a similar hierarchical control approach as does the nuller.…”

Section: Phase Stabilizationmentioning

confidence: 99%

“…Several references provide additional information on system description, 5 the nuller back-end implementation, 6,7 and integration and test. 8 Additional papers in this conference address control issues, 9,10 observing scenario, 11 atmospheric compensation, 12 and science observations, 13 as well as the overall facility 14 and visibility amplitude mode.…”

Section: Introductionmentioning

confidence: 99%

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Nulling at the Keck interferometer

Colavita

Serabyn

Wizinowich

et al. 2006

Advances in Stellar Interferometry

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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 V 2 system, along with a presentation of some recent engineering data.

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Section: Beamline Updatementioning

confidence: 99%

Section: Phase Stabilizationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nulling at the Keck interferometer

Colavita

Serabyn

Wizinowich

et al. 2006

Advances in Stellar Interferometry

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“…A more symmetrical nuller was then built, the modified Mach-Zehnder nuller [4] (MMZ) in which field inversion was performed outside the nuller and the beams traversed two beam splitters each, allowing symmetrical treatment. The Keck nuller [5] employs two MMZ nullers to null four input beams. More recently, laboratory work has utilized Mach-Zehnder schemes to produce symmetrical nulling systems for the Planet Detection Testbed (PDT) [6] and the Achromatic Nulling Testbed (ANT) [7], for example.…”

Section: Introductionmentioning

confidence: 99%

Starlight Nulling Technology at the Jet Propulsion Laboratory

Martin

2007

2007 IEEE Aerospace Conference

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The current interests in extra-solar planet detection and space-based and ground-based interferometry for astronomical observations have led to the development of a number of nulling instruments at the Jet Propulsion Laboratory (JPL) and elsewhere. This paper 12 summarizes briefly JPL's efforts in nulling interferometry to date and consists of illustrations of some key nulling technologies. The basic optical layouts of instruments demonstrating three different nulling techniques are shown. In an effort to narrow the area of discussion, some notable nulling efforts made elsewhere will not be included.

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“…The H-and K-band visibility amplitude mode 4,5,6 was commissioned in 2004, and continues to be available to the entire Keck community (Caltech, UC, NASA, UH, & NOAO) through the standard proposal process. 7 More recently, the 10 um nulling mode 8,9,10,11,12 completed its engineering development and performance validation. Starting in Feb. 2008, an intensive one-year NASA key science program began, with three competitively-selected science teams.…”

Section: Introductionmentioning

confidence: 99%

Keck Interferometer nuller update

et al. 2008

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The Keck Interferometer combines the two 10 m Keck telescopes as a long baseline interferometer, funded by NASA, as a joint development among the Jet Propulsion Laboratory, the W. M. Keck Observatory, and the Michelson Science Center. Since 2004, it has offered an Hand K-band fringe visibility mode through the Keck TAC process. Recently this mode has been upgraded with the addition of a grism for higher spectral resolution. The 10 um nulling mode, for which first nulling data were collected in 2005, completed the bulk of its engineering development in 2007. At the end of 2007, three teams were chosen in response to a nuller key science call to perform a survey of nearby stars for exozodiacal dust. This key science observation program began in Feb. 2008. Under NSF funding, Keck Observatory is leading development of ASTRA, a project to add dual-star capability for high sensitivity observations and dual-star astrometry. We review recent activity at the Keck Interferometer, with an emphasis on the nuller development.

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The Keck Interferometer Nuller (KIN): configuration, measurement approach, and first results

Cited by 5 publications

References 1 publication

Nulling at the Keck interferometer

Nulling at the Keck interferometer

Starlight Nulling Technology at the Jet Propulsion Laboratory

Keck Interferometer nuller update

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