The Ultra-High Energy Cosmic Ray Spectrum Measured by the Telescope   Array's Middle Drum Detector
  The Telescope Array's Middle Drum fluorescence detector was constructed using refurbished telescopes from the High Resolution Fly's Eye (HiRes) experiment. As such, there is a direct comparison between these two experiments' fluorescence energy spectra. An energy spectrum has been calculated based on one year of collected data by the Middle Drum site of Telescope Array and agrees well with the HiRes monocular spectra. The quality of the Middle Drum results has also been determined to show good agreement. 
Douglas Rodriguez and Matt Wood (for the Telescope Array   Collaboration)
astro-ph.IM astro-ph.HE hep-ex physics.ins-det