Volume 621, January 2019
|Number of page(s)||21|
|Published online||19 December 2018|
ARGOS at the LBT
Binocular laser guided ground-layer adaptive optics
1 Max-Planck-Institut für extraterrestrische Physik, Giessenbachstr., Garching, Germany
2 INAF Osservatorio Astrofisico di Arcetri, Florence, Italy
3 Max-Planck-Institut für Astronomie, Königstuhl 17, Heidelberg, Germany
4 Landesternwarte, Königstuhl 12, Heidelberg, Germany
5 Leibniz-Institut für Astrophysik Potsdam (AIP), An der Sternwarte 16, Potsdam, Germany
6 Max Planck Institut für Radioastronomie, Auf dem Hügel 69, Bonn, Germany
7 Steward Observatory, 933 North Cherry Avenue, University of Arizona, Tucson, AZ, USA
8 Large Binocular Telescope Observatory, 933 North Cherry Avenue, Tucson, AZ, USA
9 European Space Agency – ESTEC, Keplerlaan 1, Noordwijk, The Netherlands
10 Space sciences, Technologies and Astrophysics Research (STAR) Institute Université de Liège, Belgium
Accepted: 19 October 2018
Having completed its commissioning phase, the Advanced Rayleigh guided Ground-layer adaptive Optics System (ARGOS) facility is coming online for scientific observations at the Large Binocular Telescope (LBT). With six Rayleigh laser guide stars in two constellations and the corresponding wavefront sensing, ARGOS corrects the ground-layer distortions for both LBT 8.4 m eyes with their adaptive secondary mirrors. Under regular observing conditions, this set-up delivers a point spread function (PSF) size reduction by a factor of 2–3 compared to a seeing-limited operation. With the two LUCI infrared imaging and multi-object spectroscopy instruments receiving the corrected images, observations in the near-infrared can be performed at high spatial and spectral resolution. We discuss the final ARGOS technical set-up and the adaptive optics performance. We show that imaging cases with ground-layer adaptive optics (GLAO) are enhancing several scientific programmes, from cluster colour magnitude diagrams and Milky Way embedded star formation, to nuclei of nearby galaxies or extragalactic lensing fields. In the unique combination of ARGOS with the multi-object near-infrared spectroscopy available in LUCI over a 4 × 4 arcmin field of view, the first scientific observations have been performed on local and high-z objects. Those high spatial and spectral resolution observations demonstrate the capabilities now at hand with ARGOS at the LBT.
Key words: instrumentation: adaptive optics / instrumentation: high angular resolution / instrumentation: spectrographs / gravitational lensing: strong
© ESO 2018
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.