UVscope and its application aboard the ASTRI-Horn telescope
M.C. Maccarone, G. La Rosa, O. Catalano, S. Giarrusso, A. Segreto, B., Biondo, P. Bruno, C. Gargano, A. Grillo, D. Impiombato, Fr. Russo, G. Sottile

TL;DR
UVscope is a photon detector instrument used on the ASTRI-Horn telescope to measure night sky brightness, aiding in calibration and environmental monitoring for high-energy astrophysics observations.
Contribution
This paper introduces UVscope, a multi-pixel photon detector instrument, and details its application on the ASTRI-Horn telescope for environmental measurement and calibration.
Findings
UVscope successfully measures night sky brightness in real-time.
It provides calibration support for the ASTRI-Horn telescope.
The instrument operates without interfering with main observations.
Abstract
UVscope is an instrument, based on a multi-pixel photon detector, developed to support experimental activities for high-energy astrophysics and cosmic ray research. The instrument, working in single photon counting mode, is designed to directly measure light flux in the wavelengths range 300-650~nm. The instrument can be used in a wide field of applications where the knowledge of the nocturnal environmental luminosity is required. Currently, one UVscope instrument is allocated onto the external structure of the ASTRI-Horn Cherenkov telescope devoted to the gamma-ray astronomy at very high energies. Being co-aligned with the ASTRI-Horn camera axis, UVscope can measure the diffuse emission of the night sky background simultaneously with the ASTRI-Horn camera, without any interference with the main telescope data taking procedures. UVscope is properly calibrated and it is used as an…
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