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SCExAO, an instrument with a dual purpose: perform cutting-edge science and develop new technologiesLozi, Julien; Guyon, Olivier; Jovanovic, Nemanja; Goebel, Sean; Pathak, Prashant; Skaf, Nour; Sahoo, Ananya; Norris, Barnaby; Frantz Martinache; N'Diaye, Mamadou; Mazin, Ben; Walter, Alex B; Tuthill, Peter; Kudo, Tomoyuki; Kawahara, Hajime; Kotani, Takayuki; Ireland, Michael; Cvetojevic, Nick; Huby, Elsa; Lacour, Sylvestre; Vievard, Sebastien; Groff, Tyler D; Chilcote, Jeffrey K; Kasdin, Jeremy; Knight, Justin; Snik, Frans; Doelman, David; Minowa, Yosuke; Clergeon, Christophe; Naruhisa Takato; Tamura, Motohide; Currie, Thayne; Takami, Hideki; Hayashi, Masa
arXiv.org, 09/2018Paper, Journal Article
The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument is an extremely modular high-contrast instrument installed on the Subaru telescope in Hawaii. SCExAO has a dual purpose. Its position in the northern hemisphere on a 8-meter telescope makes it a prime instrument for the detection and characterization of exoplanets and stellar environments over a large portion of the sky. In addition, SCExAO's unique design makes it the ideal instrument to test innovative technologies and algorithms quickly in a laboratory setup and subsequently deploy them on-sky. SCExAO benefits from a first stage of wavefront correction with the facility adaptive optics AO188, and splits the 600-2400 nm spectrum towards a variety of modules, in visible and near infrared, optimized for a large range of science cases. The integral field spectrograph CHARIS, with its J, H or K-band high-resolution mode or its broadband low-resolution mode, makes SCExAO a prime instrument for exoplanet detection and characterization. Here we report on the recent developments and scientific results of the SCExAO instrument. Recent upgrades were performed on a number of modules, like the visible polarimetric module VAMPIRES, the high-performance infrared coronagraphs, various wavefront control algorithms, as well as the real-time controller of AO188. The newest addition is the 20k-pixel Microwave Kinetic Inductance Detector (MKIDS) Exoplanet Camera (MEC) that will allow for previously unexplored science and technology developments. MEC, coupled with novel photon-counting speckle control, brings SCExAO closer to the final design of future high-contrast instruments optimized for Giant Segmented Mirror Telescopes (GSMTs).
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