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26 April 2024

» arxiv » astro-ph/0507577

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Optical Relative Calibration and Stability Monitoring for the Auger Fluorescence Detector
Pierre Auger Collaboration: C. Aramo ; J. Brack ; R. Caruso ; D. D’Urso ; D. Fazio ; R. Fonte ; H. Gemmeke ; M. Kleifges ; R. Knapik ; A. Insolia ; J. A. J. Matthews ; A. Menshikov ; W. Miller ; P. Privitera ; J. Rodriguez Martino ;
Date:	25 Jul 2005
Journal:	Proceedings of the 29th International Cosmic Ray Conference, Pune, India (2005)
Subject:	astro-ph
Abstract:	The stability of the fluorescence telescopes of the Pierre Auger Observatory is monitored with the optical relative calibration setup. Optical fibers distribute light pulses to three different diffuser groups within the optical system. The total charge per pulse is measured for each pixel and compared with reference calibration measurements. This allows monitoring the short and long term stability with respect of the relative timing between pixels and the relative gain for each pixel. The designs of the LED calibration unit (LCU) and of the Xenon flash lamp used for relative calibration, are described and their capabilities to monitor the stability of the telescope performances are studied. We report the analysis of relative calibration data recorded during 2004. Fluctuations in the relative calibration constants provide a measure of the stability of the FD.
Source:	arXiv, astro-ph/0507577
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