The Auger High Energy Astro-physics experiment seeks to detect high energy particles entering the earth\u2019s atmosphere through the detection of a Chrenkov shower.\u00a0 These events have a cross section with the atmosphere of approximately 1 event * km-1<\/sup>year-1<\/sup> so a very large detector is needed.\u00a0 The detector being used spans an area the size of Delaware in the desert of Argentina. \u00a0Many ground based detector water tanks equipped with photomultiplier tubes are used to create the large detection area.\u00a0 A secondary fluorescence detector is used to help determine the direction of the shower and improve the accuracy of reconstructions.\u00a0 The ground based detectors are equipped with a GPS receiver\/antenna used to determine the time of each event.\u00a0 These clocks must be accurate to an estimated 20ns for event reconstructions to be valid.\u00a0 Using the powerful reconstructions provided through ground-array and fluorescence detector data the event timing of the clocks on each of the GPS receivers used will be tested.\u00a0 This data will be compared to receiver timing offsets measured in our lab this summer.\u00a0 The effects of second order changes in the behavior of the GPS clocks on event reconstruction will also be determined.<\/p>\n","protected":false},"excerpt":{"rendered":" Nathan Kundtz with Corbin CovaultEvent reconstruction analysis of hybrid ground array and fluorescence detector data for the Auger project<\/p>\n The Auger High Energy Astro-physics experiment seeks to detect high energy particles entering the earth\u2019s atmosphere through the detection of a Chrenkov shower.\u00a0 These events have a cross section with the atmosphere of approximately 1 event * km-1year-1 so a very large detector is needed.\u00a0 The detector being used spans an area the size of Delaware in the desert of Argentina. \u00a0Many ground based detector water tanks equipped with photomultiplier tubes are used to create the large detection area.\u00a0<\/p>\n