On-sky performance and recent results from the Subaru coronagraphic extreme adaptive optics system

Thayne Currie; Olivier Guyon; Julien Lozi; Ananya Sahoo; Sebastien Vievard; Vincent Deo; Jeffrey Chilcote; Tyler Groff; Timothy D. Brandt; Kellen Lawson; Nour Skaf; Frantz Martinache; N. Jeremy Kasdin

doi:10.1117/12.2576349

13 December 2020 On-sky performance and recent results from the Subaru coronagraphic extreme adaptive optics system

Thayne Currie, Olivier Guyon, Julien Lozi, Ananya Sahoo, Sebastien Vievard, Vincent Deo, Jeffrey Chilcote, Tyler Groff, Timothy D. Brandt, Kellen Lawson, Nour Skaf, Frantz Martinache, N. Jeremy Kasdin

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Proceedings Volume 11448, Adaptive Optics Systems VII; 114487H (2020) https://doi.org/10.1117/12.2576349
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

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Abstract

We describe the current on-sky performance of the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument on the Subaru telescope on Maunakea, Hawaii. SCExAO is continuing to advance its AO performance, delivering H band Strehl ratios in excess of 0.9 for bright stars. We describe new advances with SCExAO’s wavefront control that lead to a more stable corrected wavefront and diffraction-limited imaging in the optical, modifications to code that better handle read noise suppression within CHARIS, and tests of the spectrophotometric precision and accuracy within CHARIS. We outline steps in the CHARIS Data Processing Pipeline that output publication-grade data products. Finally, we note recent and upcoming science results, including the discovery of new directly-imaged systems and multiwavelength, deeper characterization of planet-forming disks, and upcoming technical advances that will improve SCExAO’s sciencec capabilities.

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Thayne Currie, Olivier Guyon, Julien Lozi, Ananya Sahoo, Sebastien Vievard, Vincent Deo, Jeffrey Chilcote, Tyler Groff, Timothy D. Brandt, Kellen Lawson, Nour Skaf, Frantz Martinache, and N. Jeremy Kasdin "On-sky performance and recent results from the Subaru coronagraphic extreme adaptive optics system", Proc. SPIE 11448, Adaptive Optics Systems VII, 114487H (13 December 2020); https://doi.org/10.1117/12.2576349

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