KI V² Frequently Asked Questions

The following is our working list of frequently asked questions about KI K-K V² observing.

• Operating wavelengths: K (2.2 um) and H (1.6 um)
• Spectral dispersion: 8 pixels across K & H
• Nominal Fringe spacing for 85 m K-K baseline:
  • K: 5.2 mas
  • H: 3.8 mas
• Sky coverage:
  • Delay Range:
    • instantaneous (fast delay lines): +/- 16.5 m
    • gross/static (long delay lines): +/- 100m
  • Zenith Range:
    • 55 deg from zenith (Naysmith platforms come into play 55 deg zenith)
    • 3 deg around zenith excluded
• Observing overheads: Nominal fringe integration timing: ~10 min
• Maximum Field: 50 mas (set by fiber/diffraction limited spot of Kecks)
• K-K Baseline K-band u-v Coverage (as a function of declination):
  • 50 deg dec
  • 35 deg dec
  • 25 deg dec
  • 15 deg dec
  • 5 deg dec
  • 0 deg dec
  • -5 deg dec
  • -15 deg dec
  • -25 deg dec