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Proceedings Paper

Status report on the Large Binocular Telescope's ARGOS ground-layer AO system
Author(s): M. Hart; S. Rabien; L. Busoni; L. Barl; U. Beckmann; M. Bonaglia; Y. Boose; J. L. Borelli; T. Bluemchen; L. Carbonaro; C. Connot; M. Deysenroth; R. Davies; O. Durney; M. Elberich; T. Ertl; S. Esposito; W. Gaessler; V. Gasho; H. Gemperlein; P. Hubbard; S. Kanneganti; M. Kulas; K. Newman; J. Noenickx; G. Orban de Xivry; D. Peter; A. Quirrenbach; M. Rademacher; C. Schwab; J. Storm; V. Vaitheeswaran; G. Weigelt; J. Ziegleder
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Paper Abstract

ARGOS, the laser-guided adaptive optics system for the Large Binocular Telescope (LBT), is now under construction at the telescope. By correcting atmospheric turbulence close to the telescope, the system is designed to deliver high resolution near infrared images over a field of 4 arc minute diameter. Each side of the LBT is being equipped with three Rayleigh laser guide stars derived from six 18 W pulsed green lasers and projected into two triangular constellations matching the size of the corrected field. The returning light is to be detected by wavefront sensors that are range gated within the seeing-limited depth of focus of the telescope. Wavefront correction will be introduced by the telescope's deformable secondary mirrors driven on the basis of the average wavefront errors computed from the respective guide star constellation. Measured atmospheric turbulence profiles from the site lead us to expect that by compensating the ground-layer turbulence, ARGOS will deliver median image quality of about 0.2 arc sec across the JHK bands. This will be exploited by a pair of multi-object near-IR spectrographs, LUCIFER1 and LUCIFER2, with 4 arc minute field already operating on the telescope. In future, ARGOS will also feed two interferometric imaging instruments, the LBT Interferometer operating in the thermal infrared, and LINC-NIRVANA, operating at visible and near infrared wavelengths. Together, these instruments will offer very broad spectral coverage at the diffraction limit of the LBT's combined aperture, 23 m in size.

Paper Details

Date Published: 16 September 2011
PDF: 11 pages
Proc. SPIE 8149, Astronomical Adaptive Optics Systems and Applications IV, 81490J (16 September 2011); doi: 10.1117/12.893916
Show Author Affiliations
M. Hart, Steward Observatory, The Univ. of Arizona (United States)
S. Rabien, Max-Planck-Institut für extraterrestrische Physik (Germany)
L. Busoni, INAF - Osservatorio Astrofisico di Arcetri (Italy)
L. Barl, Max-Planck-Institut für extraterrestrische Physik (Germany)
U. Beckmann, Max-Planck-Institut für Radioastronomie (Germany)
M. Bonaglia, INAF - Osservatorio Astrofisico di Arcetri (Italy)
Y. Boose, Max-Planck-Institut für extraterrestrische Physik (Germany)
J. L. Borelli, Max-Planck-Institut für Astronomie (Germany)
T. Bluemchen, Max-Planck-Institut für Astronomie (Germany)
L. Carbonaro, INAF - Osservatorio Astrofisico di Arcetri (Italy)
C. Connot, Max-Planck-Institut für Radioastronomie (Germany)
M. Deysenroth, Max-Planck-Institut für extraterrestrische Physik (Germany)
R. Davies, Max-Planck-Institut für extraterrestrische Physik (Germany)
O. Durney, Steward Observatory, The Univ. of Arizona (United States)
M. Elberich, Max-Planck-Institut für Radioastronomie (Germany)
T. Ertl, Max-Planck-Institut für extraterrestrische Physik (Germany)
S. Esposito, INAF - Osservatorio Astrofisico di Arcetri (Italy)
W. Gaessler, Max-Planck-Institut für Astronomie (Germany)
V. Gasho, Steward Observatory, The Univ. of Arizona (United States)
H. Gemperlein, Max-Planck-Institut für extraterrestrische Physik (Germany)
P. Hubbard, Steward Observatory, The Univ. of Arizona (United States)
S. Kanneganti, Max-Planck-Institut für extraterrestrische Physik (Germany)
M. Kulas, Max-Planck-Institut für Astronomie (Germany)
K. Newman, Steward Observatory, The Univ. of Arizona (United States)
J. Noenickx, Steward Observatory, The Univ. of Arizona (United States)
G. Orban de Xivry, Max-Planck-Institut für extraterrestrische Physik (Germany)
D. Peter, Max-Planck-Institut für Astronomie (Germany)
A. Quirrenbach, Landessternwarte Heidelberg (Germany)
M. Rademacher, Steward Observatory, The Univ. of Arizona (United States)
C. Schwab, Landessternwarte Heidelberg (Germany)
J. Storm, Astrophysikalisches Institut Potsdam (Germany)
V. Vaitheeswaran, Steward Observatory, The Univ. of Arizona (United States)
G. Weigelt, Max-Planck-Institut für Radioastronomie (Germany)
J. Ziegleder, Max-Planck-Institut für extraterrestrische Physik (Germany)


Published in SPIE Proceedings Vol. 8149:
Astronomical Adaptive Optics Systems and Applications IV
Robert K. Tyson; Michael Hart, Editor(s)

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