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ATRAN TRANSMISSION AND S/N THROUGH VARIOUS MID-IR FILTERS ON MAUNA KEA AND CERRO PACHO (S/N est. includes 4% telescope + instrument emissivity) ===================================================================== MAUNA KEA Transmission S/N (norm to secz=1,1mm H2O) 1.0mm 1.6mm 3.0mm 5.0mm H2O 1.0mm 1.6mm 3.0mm 5.0mm airmass Si-1
Table 1 below shows the time taken for the background (sky + telescope) to reach 50% full-well capacity of the NIRI Aladdin array in spectroscopy mode. Table 2 shows the brightness of a stellar source (in magnitudes) that will fill 80% of the well of a NIRI array pixel in a one-second exposure (0.2 sec exposure at M).
This section explains how to configure ALTAIR in the Observing Tool and how to specify the AO and tip/tilt star in the "Target Component" when ALTAIR is being used.
Altair Optomechanical Overview
Papers describing aspects of ALTAIR include: