La Silla Overheads

Telescope Instrument Action Time (minutes)
3.6m   Preset 5
3.6m   Preset, within a few degrees from previous target 2
3.6m   Focussing 10
  HARPS Fibre automatic redefinition, object centering on fibre, start guiding 1
  HARPS Instrument configuration 0.5
  HARPS Readout+writing image to disk (416 kpx/s speed) 0.38
  HARPS Readout+writing image to disk (104 kpx/s speed) 1.45
  HARPS Minimum time between exposures 0.53
  HARPS HARPS/EGGS or HARPS/CES instrument change 1
  HARPS Polarimeter insertion: circular 0.25
  HARPS Polarimeter insertion: linear 0.5
  HARPS Polarimeter insertion: switching linear/circular 0.25
  HARPS Polarimeter rotation 0.2
NTT   Preset 10
  SOFI Imaging ~30% of integration time
  SOFI Spectroscopy ~25% of integration time
  EFOCS2 Readout + writing file to disk: slow, 1x1 2.67
  EFOCS2 Readout + writing file to disk: slow, 2x2 1.33
  EFOCS2 Readout + writing file to disk: normal,1x1 1.17
  EFOCS2 Readout + writing file to disk: normal, 2x2 0.67
  EFOCS2 Readout + writing file to disk: fast, 1x1 0.40
  EFOCS2 Readout + writing file to disk: fast, 2x2 0.17
  EFOCS2 Spectroscopic acquisition:  
  EFOCS2 -: Setup 1
  EFOCS2 -: 2 cycles, see readout above  
  EFOCS2 Spectroscopic acquisition, narrow slit: add 1