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Abstract: The Effelsberg-Bonn HI Survey EBHIS covers the whole sky north of Dec2000= -5 deg. on a fully sampled angular grid. Using state-of-the-artFPGA-spectrometers we perform a Milky Way and an extragalactic HI survey inparallel. Moreover, the high dynamic range and short dump time of the HIspectra allow to overcome the vast majority of all radio-frequency-interferenceRFI events. The Milky Way data will be corrected for the stray-radiation biaswhich warrants a main-beam efficiency of 99%. Towards the whole survey area weexceed the sensitivity limit of HIPASS, while towards theSloan-Digital-Sky-Survey SDSS area EBHIS offers an order of magnitude highermass sensitivity. The Milky Way data will be a cornerstone for multi-frequencyastrophysics, while the extragalactic part will disclose detailed informationon the structure formation of the local universe.

Autor: J. Kerp, B. Winkel, P.M.W. Kalberla Argelander-Institut fuer Astronomie, Bonn University


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