NOTE: Most of the High Level Science Products are unavailable while
unscheduled maintenance is being performed. They will be incrementally
restored over the course of this week. We apologize for any inconvenience.
X-ray Multi-Mirror (XMM) Telescope
The X-ray Multi-Mirror (XMM) Telescope
was launched by ESA on December 10th, 1999 and carries two distinct
types of telescope: three Wolter type-1 X-ray telescopes, with different
X-ray detectors in their foci,
and a 30-cm optical/UV telescope with a microchannel-plate pre-amplified
CCD detector in its focal plane.
The Optical Monitor can provide spectral resolution by the use of broad-
and narrow-band filters contained within a filter wheel, plus there are also
two grisms in the filter wheel for low resolution spectroscopy. The spatial pixel
size in normal operation is 1 arc second and the limiting sensitivity is B=24
for a star viewed with the detector in unfiltered light.