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The atmospheric transparency measured with a LIDAR system at the Telescope Array experiment

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arxiv 1109.1196 v1 pith:BE5SBTYO submitted 2011-09-05 astro-ph.IM physics.ao-phphysics.ins-det

Takayuki Tomida , Yusuke Tsuyuguchi , Takahito Arai , Takuya Benno , Michiyuki Chikawa , Koji Doura , Masaki Fukushima , Kazunori Hiyama
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Ken Honda Daisuke Ikeda John N. Matthews Toru Nakamura Daisuke Oku Hiroyuki Sagawa Hisao Tokuno Yuichiro Tameda Gordon B. Thomson Yoshiki Tsunesada Shigeharu Udo Hisashi Ukai
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classification astro-ph.IMphysics.ao-phphysics.ins-det
keywords aerosolatmosphericarraygroundlidarmeasuredtelescopetransparency
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abstract

An atmospheric transparency was measured using a LIDAR with a pulsed UV laser (355nm) at the observation site of Telescope Array in Utah, USA. The measurement at night for two years in $2007\sim 2009$ revealed that the extinction coefficient by aerosol at the ground level is $0.033^{+0.016}_{-0.012} \rm km^{-1}$ and the vertical aerosol optical depth at 5km above the ground is $0.035^{+0.019}_{-0.013}$. A model of the altitudinal aerosol distribution was built based on these measurements for the analysis of atmospheric attenuation of the fluorescence light generated by ultra high energy cosmic rays.

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