The atmospheric attenuation of Cherenkov photons is dominated by two processes: Rayleigh scattering from the molecular component and Mie scattering from the aerosol component. Aerosols are expected to contribute up to 30 Wm−2 to the emission profile of the atmosphere, equivalent to a difference of ~20C to the clear sky brightness temperature under normal conditions. Here we investigate the aerosol contribution of the measured sky brightness temperature at the H.E.S.S. site; compare it to effective changes in the telescope trigger rates; and discuss how it can be used to provide an assessment of sky clarity that is unambiguously free of telescope systematics.
@article{arxiv.1402.4739,
title = {Determining Atmospheric Aerosol Content With An Infra-red Radiometer},
author = {M. K. Daniel and Y. T. E. Lo and P. M. Chadwick},
journal= {arXiv preprint arXiv:1402.4739},
year = {2014}
}
Comments
Proceedings of a presentation at the atmoHEAD 2013 workshop. Re-uploaded as previous arXiv file became corrupted