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EP: Fachverband Extraterrestrische Physik

EP 2: Astrophysik II

EP 2.1: Hauptvortrag

Montag, 26. März 2007, 11:30–12:00, H46

eROSITA: telescope calibration and science expectations — •Michael Freyberg — MPI f. extraterrestrische Physik, 85748 Garching, Germany

The “eROSITA” (extended ROentgen Survey with an Imaging Telescope Array) observatory will be launched in the 2010-2011 timeframe with the Russian “Spectrum-RG” mission. The optics will consist of 7 Wolter-I telescopes with 54 nested mirror shells each, which will look in parallel. The focal plane instrumentation will be equipped with newly developed framestore CCD devices. The mission will perform several complete all-sky surveys in the first years, along with wide-area and deep surveys towards the galactic poles.

The primary science goal is the detection of about 50-100 thousands of cluster of galaxies, to study the large scale structure of the universe and to test cosmological models, including the quest for “dark energy”.

Moreover, eROSITA will not only perform the first all-sky survey with imaging telescopes in the 2-10 keV energy range, but also provide much better spectral resolution in the 0.2-2 keV range, previously covered by the ROSAT PSPC All-Sky survey in 1990. This will also allow detailed studies of diffuse and thermal emission, like from supernova remnants or from the interstellar medium in general. We will summarize the future calibration of the telescopes, and highlight some of the science return expected from the mission.