XMM-Newton Users Handbook

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Next: 4.6 Observing modes Up: 4.5 Observation overheads Previous: 4.5.2 Instrument and setup overheads

4.5.3 Special science exposures

Optimal scientific usage of the XMM-Newton instruments sometimes requires special (science) exposures. These are not overheads and therefore part of the requested science observing time:

Consequently, the observer should specify such additional exposures in the proposal.

European Space Agency - XMM-Newton Science Operations Centre