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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 421688.0, MPI für Astronomie / Publikationen_mpia
GRAVITY: microarcsecond astrometry and deep interferometric imaging with the VLTI
Authors:Eisenhauer, F.; Perrin, G.; Straubmeier, C.; Brandner, W.; Boehm, A.; Cassaing, F.; Clenet, Y.; Dodds-Eden, K.; Eckart, A.; Fedou, P.; Gendron, E.; Genzel, R.; Gillessen, S.; Graeter, A.; Gueriau, C.; Hamaus, N.; Haubois, X.; Haug, M.; Henning, T.; Hippler, S.; Hofmann, R.; Hormuth, F.; Houairi, K.; Kellner, S.; Kervella, P.; Klein, R.; Kolmeder, J.; Laun, W.; Lena, P.; Lenzen, R.; Marteaud, M.; Meschke, D.; Naranjo, V.; Neumann, U.; Paumard, T.; Perger, M.; Perret, D.; Rabien, S.; Ramos, J. R.; Reess, J. M.; Rohloff, R. R.; Rouan, D.; Rousset, G.; Ruyet, B.; Schropp, M.; Talureau, B.; Thiel, M.; Ziegleder, J.; Ziegler, D.
Language:English
Publisher:Cambridge Univ. Press
Date of Publication (YYYY-MM-DD):2008
Title of Proceedings:A Giant Step: from Milli- to Micro-arcsecond Astrometry
Start Page:100
End Page:101
Title of Series:IAU Symposium
Volume (in Series):248
Name of Conference/Meeting:IAU Symposium
Review Status:not specified
Audience:Experts Only
Abstract / Description:We present the adaptive optics assisted, near-infrared VLTI instrument GRAVITY for precision narrow-angle astrometry and interferometric phase referenced imaging of faint objects. With its two fibers per telescope beam, its internal wavefront sensors and fringe tracker, and a novel metrology concept, GRAVITY will not only push the sensitivity far beyond what is offered today, but will also advance the astrometric accuracy for UTs to 10 muas. GRAVITY is designed to work with four telescopes, thus providing phase referenced imaging and astrometry for 6 baselines simultaneously. Its unique capabilities and sensitivity will open a new window for the observation of a wide range of objects, and --- amongst others --- will allow the study of motion within a few times the event horizon size of the Galactic Center black hole.
Free Keywords:instrumentation: interferometers; instrumentation: adaptive optics; Galaxy: center
Comment of the Author/Creator:Date: 2008, n/a 1, 2008
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2008IAUS..248..100E [ID No:1]
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