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Finding gamma ray events by the method of obtaining poisson distribution from data collected by an array of Cherenkov detectors
, Article 31st International Cosmic Ray Conference, ICRC 2009, 7 July 2009 through 15 July 2009, Lodz ; 2009 ; Qomi, M. K ; Samimi, J ; Hamedivafa, H ; Sheidaei, F ; Bahmanabadi, M ; Sharif University of Technology
Abstract
a small array of Water Cherenkov Detectors (WCDs) has recorded 600000 events related to extensive air showers in Tehran during one year at an altitude of 1200m. By employing the method of obtaining count in each time interval distributions we obtained the distribution of extensive air showers. 17 events were found in our data set which are more probable to be related to primary gamma ray photons. For more certainty we did a simulation to compare acquired results from simulation and data to become sure if 17 extensive air showers are electromagnetic or not
Study on extensive air showers with a small array of water cherenkov detectors
, Article 4th International Meeting on High Energy Gamma-Ray Astronomy, Heidelberg, 7 July 2008 through 11 July 2008 ; Volume 1085 , 2009 , Pages 708-711 ; 0094243X (ISSN) ; Bayesteh, Sh ; Bahmanabadi, M ; Khakian Ghomi, M ; Samimi, J ; Hamedivafa, H ; Sharif University of Technology
2009
Abstract
We recorded 600,000 (EASs) from Dec. 2006 to Oct. 2007 with a small array of water Cherenkov detectors. We found zenith and azimuth distributions of these events that confirm previous distributions from array of scintillator detectors. The study on EGRET sources are under consideration, besides, we have improved the size of our detectors to yield the best efficiency. The best shape for each detector will be a tank with 40 cm in diameter and 60 cm in height with a PMT in the center of lid. © 2009 American Institute of Physics