| About ROSAT |
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The scientific instruments onboard ROSAT were turned on two weeks after launch. The next six weeks were devoted to the calibration of all hardware components. After that the all-sky survey was performed in a continuous six month period using the PSPC in the focus of the X-ray telescope and in two XUV wave bands. Following the all-sky survey, two observing periods of six months each will be used for pointed observations; in a period of six months the whole sky is accessible to ROSAT. All of the observing time in the pointed phase is available to guest investigators from the participating countries on a competitive peer review proposal basis. Should the actual ROSAT lifetime exceed its nominal value, it is anticipated that additional pointing programs will become available.
