Abstract
The Effelsberg-Bonn HI Survey (EBHIS) covers the whole sky north of Dec(2000)= −5◦ on a fully sampled angular grid. Using state-of-the-art FPGA-spectrometers we perform a MilkyWay and an extragalactic HI survey in parallel. Moreover, the high dynamic range and short dump time of the HI spectra allow to overcome the vast majority of all radio-frequency-interference (RFI) events. The Milky Way data will be corrected for the stray-radiation bias which warrants a main-beam efficiency of 99%. Towards the whole survey area we exceed the sensitivity limit of HIPASS, while towards the Sloan-Digital-Sky-Survey (SDSS) area EBHIS offers an order of magnitude higher mass sensitivity. TheMilkyWay data will be a cornerstone for multi-frequency astrophyics, while the extragalactic part will disclose detailed information on the structure formation of the local universe.
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