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Wide Angle Search for Planets

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Technical
 
  • The Torus Fork Mount
  • Weight >400 Kg
    Pointing error 30 arcsec RMS full sky
    Tracking error < 0.01 arcsec per second
    Controls Stepper motors driven by Torus motion control electronics
    Weather System Full local weather monitoring
    Time Standard GPS receiver gives better than 1s synchronisation with UTC
    Control and server computers Linux O/S
  • The CCD Cameras
  • Lens Canon 200mm f/1.8
    Aperture 11.1 cm
    CCD 2048 x 2048 thinned e2v produced by Andor of Belfast
    Pixel size 13.5 micrometers
    Readout noise 12-18 e- (in 1MHz pixel readout speed)
    Gain settings 2, 1.4, 0.7 e-/ADU
    Maximum pixel count 80,000 e-
    Field of View 7.8 x 7.8 degrees
    (61 sq. degrees)
    Plate Scale 13.7 arcsec/pixel
    Operating Temperature -50 degree C
    Cooling Mechanism 3-stage Peltier
  • The Enclosure


  • The enclosure is made from reinforced fibreglass, of dimensions 3.5m x 6.5m, split into two sections. The first section houses the Torus mount and cameras and has a slide-away roof. The second section houses the associated computers. The roof is operated hydraulically with a quick manual release mechanism for emergencies. The building is designed to tolerate < 200 km/hr wind and several metres of snow. The roof has a heating wire to prevent the build-up of ice.

     

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