A Central Laser Facility for the Cherenkov Telescope Array
Markus Gaug, Carla Aramo, Marco Cilmo, Federico Di Pierro, Aurelio, Tonachini, Piero Vallania (for the CTA Consortium)

TL;DR
This paper discusses the design and potential calibration benefits of a Central Laser Facility for the Cherenkov Telescope Array, aiming to improve calibration accuracy and atmospheric monitoring.
Contribution
It introduces a proposed laser-based calibration system for CTA, including simulation results for various configurations to optimize performance.
Findings
Potential calibration precision better than 10%
Simulations show optimal laser configurations
Enables long-term sensitivity monitoring
Abstract
A Central Laser Facility is a system often used in astroparticle experiments based on arrays of fluorescence or Cherenkov light detectors. The instrument is based on a laser source positioned at a certain distance from the array, emitting fast light pulses in the vertical direction with the aim of calibrating the array and/or measuring the atmospheric transmission. In view of the future Cherenkov Telescope Array (CTA), a similar device could provide a calibration of the whole installation, both relative, i.e. each individual telescope with respect to the rest of the array, and absolute, with a precision better than 10%, if certain design requirements are met. Additionally, a precise monitoring of the sensitivity of each telescope can be made on time-scales of days to years. During calibration runs of the central laser facility, all detectors will be pointed towards the same portion of…
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Taxonomy
TopicsAstrophysics and Cosmic Phenomena · Dark Matter and Cosmic Phenomena · Atmospheric Ozone and Climate
