(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.
| || |
Referenced by pages:
European Southern Observatory Very Large Telescope (ESO VLT)
Hawaii K-band Galaxy Survey
Tully-Fisher relation (TFR)