Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...191.9604t&link_type=abstract
American Astronomical Society, 191st AAS Meeting, #96.04; Bulletin of the American Astronomical Society, Vol. 29, p.1365
Astronomy and Astrophysics
Astronomy
Scientific paper
Each of the three mirrors on XMM has an effective area of 1500 square centimetres and focuses the beam on to one of three EPIC focal plane cameras. Two cameras share their beam with the Reflection Grating Spectrometer, while the third receives the full beam; the PSF of the mirrors is 13 arc seconds HEW. The EPIC cameras contain CCD arrays covering the full FOV of 30 arc minutes diameter. The full beam camera contains a PN CCD array while the two half beam cameras contain MOS CCDs. The PN is back illuminated with 150 micron pixels and has deep depletion; the MOS devices are front illuminated with open phase electrodes giving response down to Carbon K, they have 40 micron pixels (40 microns = 1 arc second , approximately). Both cameras return essentially Fano limited energy resolution above 2 keV. The CCDs are shielded with 3 cm aluminium against radiation damage, and can be cooled to -150 degrees to freeze out damage traps; they can also be heated to anneal out permanent damage. A six position filter wheel is provided for each camera. The FM camera MOS1 is presently being calibrated at the ORSAY synchrotron facility and will be followed by MOS 2 and the PN camera.
Arnaud Monique
Reppin Claus
Turner Martin J. L.
Villa Gabriele
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