The ROSAT mission was governed by two scientific objectivies, the first all-sky survey with an imaging X-ray and EUV telescope and the detailed study of selected X-ray und EUV sources.
As the primary objective ROSAT has performed the first all-sky survey with an imaging telescopes in a scan mode in the soft X-ray band of 0.1 keV - 2 keV (corresponding to wavelengths of 100 Å - 6 Å) as well as in the adjacent extreme ultraviolett region of 0.04 keV - 0.2 keV (corresponding to wavelengths of 300 Å - 60 Å). This part of the mission lasted half a year, and was completed in February 1991.
Following the all-sky survey, ROSAT provided detailed observations of selected sources with respect to spatial structure, spectra and time variability. In this pointing mode the sensitivity has been at least two times larger than that of former missions. The location of the sources was determined with an accuracy of at least 10 arcsec.
The successful observatory was switched off after gradual failures of critical components after more than four times it's expected life time.
|Juni 1, 1990|
|End of Mission||February 12, 1999|
re-entry into atmosphere on October 23, 2011
last update 2012-06-06 by H. Steinle