Astrophysics (Index)About

K band

(atmospheric window centered around 2.2 microns, or 136 THz)

Within astronomy, the term K band refers to an atmospheric window within the near-infrared range centered on 2.2 microns (2190 nm) or 136 THz, and a photometric system band aimed at this range, e.g., with a full width at half maximum of 390 nm. In addition to infrared-specific telescopes, many optical telescopes can observe in this range. The letter is also used to indicate the magnitude of the signal observed through the filter, e.g., citing "K = 1.5".

The term K band also has other meanings outside astronomy and there are at least two K bands defined for radio communications.

Further reading:
2.2μm136THz564meVK band

Referenced by pages:
astronomical survey
European Southern Observatory Very Large Telescope (ESO VLT)
Gemini Observatory
Hawaii K-band Galaxy Survey
infrared (IR)
Tully-Fisher relation (TFR)