SIGHT: the Palomar 5m telescope LGS AO system maximizing visible-light spectroscopic sensitivity

Richard Dekany; Mitsuko K. Roberts; Lauren Fahey; Reed Riddle; Daniel McKenna; Sebastiaan Haffert; Alexandre Delacroix; Rishi Pahuja; Jeffry Zolkower; Rick Burruss; Julian Hovanec; Christoph Baranec

doi:10.1117/12.2630632

29 August 2022 SIGHT: the Palomar 5m telescope LGS AO system maximizing visible-light spectroscopic sensitivity

Richard Dekany, Mitsuko K. Roberts, Lauren Fahey, Reed Riddle, Daniel McKenna, Sebastiaan Haffert, Alexandre Delacroix, Rishi Pahuja, Jeffry Zolkower, Rick Burruss, Julian Hovanec, Christoph Baranec

Author Affiliations +

Proceedings Volume 12185, Adaptive Optics Systems VIII; 121850P (2022) https://doi.org/10.1117/12.2630632
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

SIGHT is a new approach to adaptive optics emphasizing panchromatic image sharpening from 360 nm – 2500 nm with specific intent to increase spectrograph observing sensitivity and operational efficiency. Utilizing a single, pilot-safe ultraviolet (invisible) Rayleigh laser guide star (LGS), we prioritize all-sky seeing enhancement and energy concentration, with minimal observing overheads, over absolute spatial resolution. We accomplish this by releasing the system requirement for natural guide star (NGS) tip-tilt wavefront sensing, seeking instead partial tip-tilt information obtainable with LGS telemetry alone. By implementing an ultra-compact (17 cm x 20 cm x 56 cm) parfocal AO relay installed permanently ahead of the Cassegrain focus, we enable high-spatial-frequency AO correction over a field of view of up to 30 arcseconds in diameter. The development of AO differentiated for specific scientific goals represents a further maturation of AO technology beyond the gilded cage of Strehl ratio

Conference Presentation

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Richard Dekany, Mitsuko K. Roberts, Lauren Fahey, Reed Riddle, Daniel McKenna, Sebastiaan Haffert, Alexandre Delacroix, Rishi Pahuja, Jeffry Zolkower, Rick Burruss, Julian Hovanec, and Christoph Baranec "SIGHT: the Palomar 5m telescope LGS AO system maximizing visible-light spectroscopic sensitivity", Proc. SPIE 12185, Adaptive Optics Systems VIII, 121850P (29 August 2022); https://doi.org/10.1117/12.2630632

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