Astrophysics (Index)About

I band

(photometric filter for near infrared light)

I is used for an infrared passband, typically the near-infrared (NIR) band that is closest to visible light. There are various versions of the I band: the Johnson-Cousins system has one, but I find varying specifications cited for it, one being centered around 806 nm with a width (full width at half maximum) of 149 nm. Among the I band's uses is the observation of NIR from protoplanetary disks associated with YSOs.

I may also indicate a filter adhering to the specification and is also used to indicate the magnitude of the signal observed through the filter, e.g., citing "I = 1.5".

(EMR,infrared,near infrared,band,photometry)
Further reading:
806nm372THz1.6eVI band

Referenced by pages:
infrared (IR)
UBV photometric system