Back to Search Start Over

Correcting Imaging Atmospheric Cherenkov Telescope data with atmospheric profiles obtained with an elastic light detecting and ranging system

Authors :
Schmuckermaier, Felix
Gaug, Markus
Fruck, Christian
Moralejo, Abelardo
Hahn, Alexander
Prester, Dijana Dominis
Dorner, Daniela
Font, Lluís
Mićanović, Saša
Mirzoyan, Razmik
Paneque, David
Pavletić, Lovro
Sitarek, Julian
Will, Martin
Source :
A&A 673, A2 (2023)
Publication Year :
2023

Abstract

Context. We are operating an elastic LIDAR for the monitoring of atmospheric conditions during regular observations of the MAGIC Telescopes. Aims. We present and evaluate methods to convert aerosol extinction profiles, obtained with the LIDAR, into corrections of the reconstructed gamma-ray event energy and Instrument Response Functions of Imaging Atmospheric Cherenkov Telescopes. Methods. We assess the performance of these correction schemes with almost seven years of Crab Nebula data taken by the MAGIC Telescopes under various zenith angles and different aerosol extinction scenarios of Cherenkov light. Results. The methods enable the reconstruction of data taken under non-optimal atmospheric conditions with aerosol transmissions down to around 0.65 with systematic uncertainties comparable to those for data taken under optimal conditions. For the first time, the correction of data affected by clouds has been included in the assessment. The data can also be corrected when the transmission is lower than 0.65, but the results are less accurate and suffer from larger systematics.<br />Comment: 25 pages, 20 figures, 4 tables, accepted for publication in Astronomy & Astrophysics

Details

Database :
arXiv
Journal :
A&A 673, A2 (2023)
Publication Type :
Report
Accession number :
edsarx.2302.12072
Document Type :
Working Paper
Full Text :
https://doi.org/10.1051/0004-6361/202245787