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Proceedings Paper

The absolute calibration strategy of the ASTRI SST-2M telescope proposed for the Cherenkov Telescope Array and its external ground-based illumination system
Author(s): A. Segreto; M. C. Maccarone; O. Catalano; B. Biondo; C. Gargano; G. La Rosa; F. Russo; G. Sottile; M. Fiorini; S. Incorvaia; G. Toso
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Paper Abstract

ASTRI is the end-to-end prototype for the CTA small-size class of telescopes in a dual-mirror configuration (SST-2M) proposed by the Italian National Institute of Astrophysics (INAF) in the framework of the Cherenkov Telescope Array. ASTRI SST-2M has been installed at the Serra La Nave Astrophysical Observatory on Mount Etna (Sicily) and its Performance Verification Phase will start in autumn 2016. For the relative pixel calibration and gain monitoring, the ASTRI SST-2M camera is equipped with an internal illumination device, while an external, portable, illumination system, placed at a few km distance from the telescope, will be used for the absolute end-to-end calibration of the telescope spectral response. Moreover analysis of signals induced in the camera pixels by the night sky background (diffuse emission and reference stars) will be used to monitor the long term evolution of the telescope calibration. We present an overview of the ASTRI SST-2M absolute calibration strategy and the external illuminating device that will be used for its spectral calibration

Paper Details

Date Published: 27 July 2016
PDF: 7 pages
Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99063S (27 July 2016); doi: 10.1117/12.2231922
Show Author Affiliations
A. Segreto, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
M. C. Maccarone, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
O. Catalano, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
B. Biondo, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
C. Gargano, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
G. La Rosa, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
F. Russo, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
G. Sottile, INAF - Istituto di Astrofisica e Planetologia Spaziali (Italy)
M. Fiorini, INAF - IASF Milano (Italy)
S. Incorvaia, INAF - IASF Milano (Italy)
G. Toso, INAF - IASF Milano (Italy)


Published in SPIE Proceedings Vol. 9906:
Ground-based and Airborne Telescopes VI
Helen J. Hall; Roberto Gilmozzi; Heather K. Marshall, Editor(s)

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