Atmospheric monitoring for the H.E.S.S. Cherenkov telescope array by transmissometer and LIDAR

A. M. Brown, P. M. Chadwick, H. J. Dickinson, C. Hadjichristidis, I. J. Latham, R. Le Gallou, T. J.L. McComb, S. J. Nolan, A. Noutsos, K. J. Orford, J. L. Osborne, S. M. Rayner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A transmissometer has been installed at the H.E.S.S. site to supplement information on atmospheric absorption obtained by a LIDAR operating at 905 nm. The transmissometer monitors the absorption at this LIDAR wavelength and at 3 shorter wavelengths for the lowest 550 m of the atmosphere. The relationship between the absorption measurements and the triggering rate due to air showers produced by hadronic cosmic rays is investigated with the aim of refining the measurements of flux and energy spectra of gamma ray sources. In particular when searching for source variability, the detection of any changes in Cherenkov light extinction is of crucial importance.

Original languageEnglish (US)
Title of host publication29th International Cosmic Ray Conference, ICRC 2005
PublisherTata Institute of Fundamental Research
Pages403-406
Number of pages4
Volume5
StatePublished - Jan 1 2005
Event29th International Cosmic Ray Conference, ICRC 2005 - Pune, India
Duration: Aug 3 2005Aug 10 2005

Other

Other29th International Cosmic Ray Conference, ICRC 2005
CountryIndia
CityPune
Period8/3/058/10/05

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