Verification of the optical system of the 9.7-m prototype Schwarzschild-Couder Telescope

C. Adams, R. Alfaro, G. Ambrosi, M. Ambrosio, C. Aramo, W. Benbow, B. Bertucci, E. Bissaldi, M. Bitossi, A. Boiano, C. Bonavolontà, R. Bose, A. Brill, J. H. Buckley, K. Byrum, R. A. Cameron, M. Capasso, M. Caprai, C. E. Covault, L. Di VenereS. Fegan, Q. Feng, E. Fiandrini, A. Furniss, M. Garczarczyk, F. Garfias, A. Gent, N. Giglietto, F. Giordano, M. M. González, R. Halliday, O. Hervet, G. Hughes, T. B. Humensky, M. Ionica, A. Iriarte, W. Jin, P. Kaarat, D. Kieda, B. Kim, F. Licciulli, M. Limon, S. Loporchio, V. Masone, T. Meures, B. A.W. Mode, R. Mukherjee, D. Nieto, A. Okumura, N. Otte, N. La Palombara, F. R. Pantaleo, R. Paoletti, G. Pareschi, A. Petrashyk, J. Powell, K. Powell, D. Ribeiro, E. Roache, J. Rousselle, A. Rugliancich, J. Ruíz-Diáz-Soto, M. Santander, S. Schlenstedt, S. Scuderi, R. Shang, G. Sironi, B. Stevenson, L. Stiaccini, L. P. Taylor, L. Tosti, G. Tovmassian, V. Vagelli, M. Valentino, J. Vandenbroucke, V. V. Vassiliev, S. P. Wakely, P. Wilcox, D. A. Williams, P. Yu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations


For the first time in the history of ground-based x-ray astronomy, the on-axis performance of the dual mirror, aspheric, aplanatic Schwarzschild-Couder optical system has been demonstrated in a 9:7-m aperture imaging atmospheric Cherenkov telescope. The novel design of the prototype Schwarzschild-Couder Telescope (pSCT) is motivated by the need of the next-generation Cherenkov Telescope Array (CTA) observatory to have the ability to perform wide (≥8°) field-of-view observations simultaneously with superior imaging of atmospheric cascades (resolution of 0:067 per pixel or better). The pSCT design, if implemented in the CTA installation, has the potential to improve significantly both the x-ray angular resolution and the off-axis sensitivity of the observatory, reaching nearly the theoretical limit of the technique and thereby making a major impact on the CTA observatory sky survey programs, follow-up observations of multi-messenger transients with poorly known initial localization, as well as on the spatially resolved spectroscopic studies of extended x-ray sources. This contribution reports on the initial alignment procedures and point-spread-function results for the challenging segmented aspheric primary and secondary mirrors of the pSCT.

Original languageEnglish (US)
Title of host publicationOptical System Alignment, Tolerancing, and Verification XIII
EditorsJose Sasian, Richard N. Youngworth
ISBN (Electronic)9781510637825
StatePublished - 2020
EventOptical System Alignment, Tolerancing, and Verification XIII 2020 - Virtual, Online, United States
Duration: Aug 24 2020Sep 4 2020

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceOptical System Alignment, Tolerancing, and Verification XIII 2020
Country/TerritoryUnited States
CityVirtual, Online

Bibliographical note

Publisher Copyright:


  • Aplanatic Optical System
  • Gamma Ray
  • Imaging Cherenkov Telescopes


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