Reference : System overview of the VLTI Spectro-Imager

	Document type :	Scientific congresses and symposiums : Paper published in a book
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/109547

Title :	System overview of the VLTI Spectro-Imager
Language :	English
Author, co-author :	Jocou, L. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
	Berger, J.-P. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
	Malbet, F. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
	Kern, P. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
	Beckmann, U. [Max-Planck-Institute for Radioastronomy (Germany)]
	Lorenzetti, D. [INAF, Osservatorio di Astrofisica di Roma (Italy)]
	Corcione, L. [INAF, Osservatorio Astrofisico di Torino (Italy)]
	Li Causi, G. [INAF, Osservatorio di Astrofisica di Roma (Italy)]
	Buscher, D. [Cavendish Lab., Univ. of Cambridge (United Kingdom)]
	Young, J. [Cavendish Lab., Univ. of Cambridge (United Kingdom)]
	Gai, M. [INAF/Osservatorio Astrofisico di Torino (Italy)]
	Weigelt, G. [Max-Planck-Institute for Radioastronomy (Germany)]
	Zins, G. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
	Duvert, G. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
	Perraut, K. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
	Labeye, P. [CEA/LETI (France)]
	Absil, Olivier [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
	Garcia, P. [Ctr. for Astrophysics, Univ. of Porto (Portugal)]
	Loreggia, D. [INAF, Osservatorio di Astrofisica di Roma (Italy)]
	Lima, J. [Univ. de Lisboa (Portugal)]
	Rebordao, J. [Instituto Nacional de Engenharia, Tecnologia e Inovação (Portugal)]
	Ligori, S. [INAF, Osservatorio Astrofisico di Torino (Italy)]
	Amorim, A. [Univ. de Lisboa (Portugal)]
	Rabou, P. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
	Le Bouquin, J.-B. [European Southern Observatory (Chile)]
	Haniff, C. [Cavendish Lab., Univ. of Cambridge (United Kingdom)]
	Le Coarer, E. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
	Feautrier, P. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
	Duchene, G. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
	Benisty, M. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
	Chelli, A. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
	Herwats, Emilie [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
	Delboulbé, A. [Univ. J. Fourier, CNRS, Lab. d'Astrophysique de l'Observatoire de Grenoble (France)]
Publication date :	1-Jul-2008
Main document title :	Optical and Infrared Interferometry
Editor :	Schöller, Markus
	Danchi, William
	Delplancke, Françoise
Publisher :	SPIE
Collection and collection volume :	Proceedings of the SPIE, volume 7013
Pages :	2Y.1-2Y.12
On invitation :	No
Audience :	International
City :	Bellingham
Country :	WA
Event name :	Space Telescopes and Instrumentation 2008: Optical and Infrared Interferometry
Event date :	23/06/2008 - 28/06/2008
Event organizer :	SPIE
Event place (city) :	Marseille
Event country :	France
Abstract :	[en] The VLTI Spectro Imager project aims to perform imaging with a temporal resolution of 1 night and with a maximum angular resolution of 1 milliarcsecond, making best use of the Very Large Telescope Interferometer capabilities. To fulfill the scientific goals (see Garcia et. al.), the system requirements are: a) combining 4 to 6 beams; b) working in spectral bands J, H and K; c) spectral resolution from R= 100 to 12000; and d) internal fringe tracking on-axis, or off-axis when associated to the PRIMA dual-beam facility. The concept of VSI consists on 6 sub-systems: a common path distributing the light between the fringe tracker and the scientific instrument, the fringe tracker ensuring the co-phasing of the array, the scientific instrument delivering the interferometric observables and a calibration tool providing sources for internal alignment and interferometric calibrations. The two remaining sub-systems are the control system and the observation support software dedicated to the reduction of the interferometric data. This paper presents the global concept of VSI science path including the common path, the scientific instrument and the calibration tool. The scientific combination using a set of integrated optics multi-way beam combiners to provide high-stability visibility and closure phase measurements are also described. Finally we will address the performance budget of the global VSI instrument. The fringe tracker and scientific spectrograph will be shortly described.
Target :	Researchers ; Professionals
Permalink :	http://hdl.handle.net/2268/109547
DOI :	10.1117/12.789154
Other URL :	http://adsabs.harvard.edu/abs/2008SPIE.7013E..90J
Mentions required by the publisher for OA :	Copyright 2008 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Commentary :	http://de.arxiv.org/abs/0807.3403

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