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Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - GRI - Gamma Ray Indirect
Prototype Schwarzschild-Couder Telescope for the Cherenkov Telescope Array: Commissioning Status of the Optical System
Q. Feng,* C. Adams, G. Ambrosi, M. Ambrosio, C. Aramo, W. Benbow, B. Bertucci, E. Bissaldi, M. Bitossi, A. Boiano, C. Bonavolontà, R. Bose, A. Brill, M. Caprai, S. Fegan, Q. Feng, E. Fiandrini, A. Gent, N. Giglietto, F. Giordano, R. Halliday, O. Hervet, G. Hughes, M. Ionica, W. Jin, P. Kaaret, D. Kieda, B.T. Kim, F. Licciulli, S. Loporchio, V. Masone, T. Meures, R. Mukherjee, A. Okumura, N. Otte, R. Paoletti, A. Petrashyk, J. Powell, K. Powell, D. Ribeiro, J. Rousselle, A. Rugliancich, M. Santander, R. Shang, B. Stevenson, L. Stiaccini, L. Tosti, V. Vagelli, M. Valentino, J. Vandenbroucke, V. Vassiliev, P. Wilcox, J.H. Buckley, C.E. Covault, L. Di Venere, T.B. Humensky, B.A.W. Mode, F.R. . Pantaleo, L.P. Taylor, D.A. Williams
*corresponding author
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Pre-published on: 2019 July 22
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Abstract
The Cherenkov Telescope Array (CTA), with more than 100 telescopes, will be the largest ever ground-based gamma-ray observatory and is expected to greatly improve on both gamma-ray detection sensitivity and energy coverage compared to current-generation detectors. The 9.7-m Schwarzschild-Couder telescope (SCT) is one of the two candidates for the medium size telescope (MST) design for CTA. The novel aplanatic dual-mirror SCT design offers a wide field-of-view with a compact plate scale, allowing for a large number of camera pixels that improves the angular resolution and reduce the night sky background noise per pixel compared to the traditional single-mirror Davies-Cotton (DC) design of ground-based gamma-ray telescopes. The production, installation, and the alignment of the segmented aspherical mirrors are the main challenges for the realization of the SCT optical system. In this contribution, we report on the commissioning status, the alignment procedures, and initial alignment results during the initial commissioning phase of the optical system of the prototype SCT.
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