Enhanced seeing mode: a technique for improving wide-field angular resolution in the near-infrared using adaptive optics

Barry Rothberg; Julian C. Christou; Douglas L. Miller; Dave Thompson; Gregory E. Taylor; Christian Veillet; R. T. Gatto

doi:10.1117/12.2563359

13 December 2020 Enhanced seeing mode: a technique for improving wide-field angular resolution in the near-infrared using adaptive optics

Barry Rothberg, Julian C. Christou, Douglas L. Miller, Dave Thompson, Gregory E. Taylor, Christian Veillet, R. T. Gatto

Author Affiliations +

Proceedings Volume 11448, Adaptive Optics Systems VII; 114485I (2020) https://doi.org/10.1117/12.2563359
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

The Adaptive Optics (AO) system at the Large Binocular Telescope (LBT) in conjunction with the f/30 camera on the LBT Utility Camera in the Infrared instruments (LUCI) can achieve diffraction limited image quality over a 30" × 30" field of view (FOV). The AO system also includes the ability to deliver only 11 modes of correction (including tip and tilt) to remove residual aberrations and jitter. When combined with the f/3.75 camera on either LUCI, this Enhanced Seeing Mode (ESM) can achieve an uniform angular resolution of 0".22 over a 4' × 4' FOV in the best natural seeing conditions. Further, unlike full AO, ESM can be used for binocular longslit and multi-object high-resolution spectroscopy (R~10,000). It has been further demonstrated that even in poor seeing conditions (θ << 1′′.5) the image quality delivered to the LUCI focal stations is improved by 2-3× from 1-2.5 microns. It is proposed that ESM should become a standard observational mode for near-Infrared LBT observations.

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Barry Rothberg, Julian C. Christou, Douglas L. Miller, Dave Thompson, Gregory E. Taylor, Christian Veillet, and R. T. Gatto "Enhanced seeing mode: a technique for improving wide-field angular resolution in the near-infrared using adaptive optics", Proc. SPIE 11448, Adaptive Optics Systems VII, 114485I (13 December 2020); https://doi.org/10.1117/12.2563359

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