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GRAVITY: microarcsecond astrometry and deep interferometric imaging with the VLTI

Published online by Cambridge University Press:  01 October 2007

F. Eisenhauer
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
G. Perrin
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
C. Straubmeier
Affiliation:
I. Physikalisches Institut, Universität zu Köln, 50937 Köln, Germany
W. Brandner
Affiliation:
Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany
A. Boehm
Affiliation:
Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany
F. Cassaing
Affiliation:
ONERA, 92322 Chatillon Cedex, France
Y. Clenet
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
K. Dodds-Eden
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
A. Eckart
Affiliation:
I. Physikalisches Institut, Universität zu Köln, 50937 Köln, Germany
P. Fedou
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
E. Gendron
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
R. Genzel
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
S. Gillessen
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
A. Graeter
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
C. Gueriau
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
N. Hamaus
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
X. Haubois
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
M. Haug
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
T. Henning
Affiliation:
Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany
S. Hippler
Affiliation:
Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany
R. Hofmann
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
F. Hormuth
Affiliation:
Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany
K. Houairi
Affiliation:
ONERA, 92322 Chatillon Cedex, France
S. Kellner
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
P. Kervella
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
R. Klein
Affiliation:
Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany
J. Kolmeder
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
W. Laun
Affiliation:
Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany
P. Lena
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
R. Lenzen
Affiliation:
Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany
M. Marteaud
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
D. Meschke
Affiliation:
Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany
V. Naranjo
Affiliation:
Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany
U. Neumann
Affiliation:
Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany
T. Paumard
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
M. Perger
Affiliation:
I. Physikalisches Institut, Universität zu Köln, 50937 Köln, Germany
D. Perret
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
S. Rabien
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
J. R. Ramos
Affiliation:
Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany
J. M. Reess
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
R. R. Rohloff
Affiliation:
Max-Planck-Institut für Astronomie, 69117 Heidelberg, Germany
D. Rouan
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
G. Rousset
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
B. Ruyet
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
M. Schropp
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
B. Talureau
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
M. Thiel
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
J. Ziegleder
Affiliation:
Max-Planck-Intitut für extraterrestrische Physik, 85748 Garching, Germany mail: eisenhau@mpe.mpg.de
D. Ziegler
Affiliation:
Observatoire de Paris, LESIA, 92190 Meudon, France
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Abstract

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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 μas. 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.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2008

References

Eisenhauer, F. et al. 2008, in The Power of Optical/IR Interferometry, eds. Richichi, A., Delplancke, F., Chelli, A., Paresce, F., ESO Astrophysics Symposia, Springer, 431Google Scholar
Paumard, T. et al. 2008, in The Power of Optical/IR Interferometry, eds. Richichi, A., Delplancke, F., Chelli, A., Paresce, F., ESO Astrophysics Symposia, Springer, 313Google Scholar
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