1. Programs & Projects
  2. Mid-Scale Observatories — Cerro Tololo Inter-American Observatory
  3. Retired Instruments
  4. Hydra
  5. Fibers
  6. Efficiency of Aperture Types
  7. Efficiency of Aperture Types

Efficiency of Aperture Types

Capture Efficiency of Spectrograph Apertures

Aperture Type Seeing (arcsec)
  0.6 0.9 1.3 1.6 2.0 3.0
R=50K with 200u Fiber+slit 0.54 0.40 0.25 0.18 0.13 0.06
R=50K with 300u Fiber+slit 0.42 0.38 0.29 0.23 0.17 0.09
R=50K with Slit only 0.66 0.49 0.35 0.29 0.23 0.16
R=50K with 55 fiber IFU 1.00 0.98 0.89 0.78 0.63 0.41
 
R=25K with 200u Fiber (no slit) 0.89 0.65 0.41 0.30 0.21 0.10
R=25K with 300u Fiber+slit 0.77 0.70 0.54 0.43 0.32 0.17
R=25K with Slit only 0.93 0.79 0.62 0.53 0.44 0.30
R=25K with 55 fiber IFU 1.00 0.98 0.89 0.78 0.63 0.41
 
R=16K with 200u Fiber (no slit) 0.89 0.65 0.41 0.30 0.21 0.10
R=16K with 300u Fiber (no slit) 0.99 0.90 0.69 0.55 0.41 0.22
R=16K with Slit only 0.99 0.93 0.81 0.71 0.61 0.44
R=16K with 55 fiber IFU 1.00 0.98 0.89 0.78 0.63 0.41