Loading...

Investigation of EGRET gamma-ray sources by an extensive air shower experiment

Khakian Ghomi, M ; Sharif University of Technology | 2005

245 Viewed
  1. Type of Document: Article
  2. Publisher: Tata Institute of Fundamental Research , 2005
  3. Abstract:
  4. Ultra-high-energy ( E ≥ TeV) Extensive Air Showers (EASs) have been monitored for a period of five years (1997-2003 ), using a small array of scintillator detectors in Tehran, Iran. The data have been analyzed to take in to account of the dependence of source counts on zenith angle. During a calendar year different sources come in the field of view of the detector at varying zenith angles. Because of varying thickness of the overlaying atmosphere, the shower count rate is extremely dependent on zenith angle which have been carefully analyzed over time. High energy gamma-ray sources from the EGRET third catalogue where observed and the data were analyzed using an excess method. Upper limits were obtained for 10 EGRET sources [1]. Next we investigated the EAS event rates for the 10 sources and obtained a flux for each of them with related parameters of our experiment and some simulations. Then we investigated the gamma-ray spectrum in the Ultra-high-energy range with comparison of these fluxes with reported fluxes of and EGRET
  5. Keywords:
  6. Experiments ; Gamma rays ; Tellurium compounds ; Ultraviolet spectroscopy ; Extensive air showers ; Field of views ; Gamma ray sources ; Gamma ray spectra ; Scintillator detector ; Tehran , Iran ; Ultra-high energies ; Varying thickness ; Cosmic rays
  7. Source: 29th International Cosmic Ray Conference, ICRC 2005, Pune, 3 August 2005 through 10 August 2005 ; Volume 6 , 2005 , Pages 29-32
  8. URL: https://adsabs.harvard.edu/full/2005ICRC....6...29G