XMM-Newton Users Handbook

4.5.1 Operational overheads

XMM-Newton operational overheads are:

• Slew time to move to the target coordinates: variable, depending on the relative target position with respect to the starting spacecraft attitude; the XMM-Newton slew rate is 90$^\circ$/hour.

• AOCS reference star acquisition time and fine trim to the actual target position after a slew - about half an hour per observation.

Operational overheads do not need to be taken into account in XMM-Newton observing proposals.