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ID:
607383.0,
MPI für Astronomie / Publikationen_mpia |
The Large Binocular Telescope's ARGOS ground-layer AO system |
Authors: | Hart, M.; Rabien, S.; Busoni, L.; Barl, L.; Bechmann, U.; Bonaglia, M.; Boose, Y.; Borelli, J.; Bluemchen, T.; Carbonaro, L.; Connot, C.; Deysenroth, M.; Davies, R.; Durney, O.; Elberich, M.; Ertl, T.; Esposito, S.; Gaessler, W.; Gasho, V.; Gemperlein, H.; Hubbard, P.; Kanneganti, S.; Kulas, M.; Newman, K.; Noenickx, J.; de Xivry, G.; Qirrenback, A.; Rademacher, M.; Schwab, C.; Storm, J.; Vaitheeswaran, V.; Weigelt, G.; Ziegleder, J. | Publisher: | The Maui Economic Development Board | Date of Publication (YYYY-MM-DD): | 2011-01 | Title of Proceedings: | The Large Binocular Telescope's ARGOS ground-layer AO system | Name of Conference/Meeting: | Advanced Maui Optical and Space Surveillance Technologies Conference | Audience: | Not Specified | Abstract / Description: | 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. ARGOS is motivated by a successful prototype multi-laser guide star system on the 6.5 m MMT telescope, results from which are presented in this paper. At the LBT, each side of the twin 8.4 m aperture 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 seeinglimited depth of focus of the telescope. Wavefront correction will be introduced by the telescopeââ¬â¢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 in the near infrared bands. This will be exploited by a pair of multi-object near-IR spectrographs, LUCI1 and LUCI2, each 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 LBTââ¬â¢s combined aperture, 23 m in size. | Comment of the Author/Creator: | Date: 2011 online, September 1, 2011 | External Publication Status: | published | Document Type: | Conference-Paper |
Communicated by: | N. N. | Affiliations: | MPI für Astronomie | Identifiers: | URL:http://cdsads.u-strasbg.fr/abs/2011amos.confE..59H
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