Published online by Cambridge University Press: 12 April 2016
The West German astronomy satellite ROSAT comprises two imaging telescopes - an X-ray instrument covering the energy band 0.15-2keV and an EUV instrument (provided by the UK) covering the range 0.02-0.21keV. A primary aim of the mission is to perform a sensitive all-sky survey with both telescopes (two ‘colours’ in the EUV) in the first 6 months. This will be followed by a least one year of pointed observations at specific targets. This paper briefly describes the ROSAT instrumentation and discusses the likely impact of the survey on white dwarf studies.