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The HEAT Telescopes of the Pierre Auger Observatory Status and First Data

机译：皮埃尔·奥格天文台的HEAT望远镜状态和首次数据

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The southern Pierre Auger Observatory was designed to detect ultrahigh energy cosmic rays above 1018eV with high accuracy exploiting a hybrid detection technique. A surface array of 1660 water Cherenkov detectors ona 1500 m triangular grid covers an area of 3000 km2 . The atmosphere above the array is viewed by 24 wide angletelescopes. These telescopes observe the faint fluorescence light of the extensive air showers at dark moonless nights, i.e.with a duty cycle of about 15 %. As an enhancement to this baseline design of the Auger Observatory three additionaltelescopes with elevated field of view were built and now constitute HEAT, the high-elevation Auger telescopes. Thesetelescopes are similar to the 24 other fluorescence telescopes (FD) but can be tilted by 29 degrees upward. They cover anelevation range from 30 to 58 degrees above horizon to enable the unbiased detection of nearby low energy air showers.Especially in combination with the detector information from an infill array of water tanks on a 750 m grid close to theHEAT site the energy range of high quality hybrid air shower measurements is extended down to below 1017eV. HEAT is fully commissioned and is taking data continuously since September 2009. The status and prospects of HEAT arediscussed and first (preliminary) data are presented.
机译：南部的皮埃尔·奥格天文台旨在利用混合探测技术高精度地探测1018eV以上的超高能宇宙射线。在1500 m三角形网格上的1660个水Cherenkov探测器的表面阵列覆盖3000 km2的面积。阵列上方的大气层由24个广角望远镜观测。这些望远镜在黑暗的无月夜观察到大量空气淋浴的微弱荧光，即占空比约为15％。为了增强俄歇天文台的基线设计，制造了三台附加的高视场望远镜，它们现在构成了高海拔的俄歇望远镜HEAT。固定式望远镜与其他24个荧光望远镜（FD）相似，但可以向上倾斜29度。它们覆盖的海拔高度范围在地平线上方30至58度之间，从而能够无偏检测附近的低能空气淋浴器，特别是结合来自750 m网格上靠近HEAT站点的水箱填充阵列的检测器信息高质量的混合空气淋浴测量值可扩展至1017eV以下。自2009年9月起，HEAT已全面调试，并在不断获取数据。讨论了HEAT的现状和前景，并提供了第一个（初步）数据。

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