33RD INTERNATIONAL COSMIC RAY CONFERENCE, RIO DE JANEIRO 2013 THE ASTROPARTICLE PHYSICS CONFERENCE Ultra-High Energy Cosmic Ray Spectrum Measured by the Hybrid Analysis in the Telescope Array

Abstract: We developed a hybrid reconstruction technique using both by Fluorescence Detectors and Surface Detectors in the Telescope Array Experiment, and measured energy spectrum of ultra-high energy cosmic rays with energies above 1018.2 eV using the data obtained in our first 4-year observation. The hybrid reconstruction technique improves the accuracies in determination of arrival directions and primary energies of cosmic rays compared to that of FD monocular mode. The energy spectrum presented here is in agreement with our previously published spectra and the HiRes results