VERITAS Distant Laser Calibration and Atmospheric Monitoring
C. M. Hui (for the VERITAS Collaboration)
TL;DR
This paper discusses using laser pulses and Rayleigh scattering to calibrate VERITAS telescopes and monitor atmospheric conditions, enhancing the accuracy of Cherenkov telescope measurements.
Contribution
It introduces a method for absolute calibration of IACTs using laser-induced Rayleigh scattering and compares laser data with simulations for efficiency estimation.
Findings
Laser data matches simulations, confirming calibration accuracy
Atmospheric monitoring shows consistency over different months
Calibration improves the precision of Cherenkov telescope measurements
Abstract
As a calibrated laser pulse propagates through the atmosphere, the intensity of the Rayleigh scattered light arriving at the VERITAS telescopes can be calculated precisely. This allows for absolute calibration of imaging atmospheric Cherenkov telescopes (IACT) to be simple and straightforward. In these proceedings, we present the comparison between laser data and simulation to estimate the light collection efficiencies of the VERITAS telescopes, and the analysis of multiple laser data sets taken in different months for atmospheric monitoring purpose.
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