The IRTF Spectral Library


The IRTF Spectral Library is a collection of 0.8-5.0 μm mostly stellar spectra observed at a resolving power of R ≡ λ/Δλ ~ 2000 with the medium-resolution spectrograph, SpeX, at the NASA Infrared Telescope Facility (IRTF) on Mauna Kea. The current release covers mainly solar-metallicity late-type stars with spectral types between F and M and luminosity classes between I and V, but also includes AGB stars, carbon and S stars, and L and T dwarfs. We also include spectra of the giant planets, Jupiter, Saturn, Uranus, and Neptune. Later updates will add Wolf-Rayet, O, B, and A stars.

Features of the library include:

Last modified on: 

December 1, 2009

  1. A spectral range of 0.8 to 2.5 μm (with a subset from 0.8 to 5.2 μm)

  2. R~2000 from 0.8 to 2.5 μm and R~2500 from 2.5 to 5.2 μm

  3. S/N ~ 100 at λ < 4 μm

  4. Spectral continuum shape is preserved

  5. Absolutely flux calibrated using Two Micron All Sky Survey (2MASS)  photometry.

Maintained by Michael Cushing 


Data Format



    The WR Stars

    The O Stars

    The B Stars

    The A Stars

    The F Stars

    The G Stars

    The K Stars

    The M Stars

    The S/C Stars

    The L Dwarfs

    The T Dwarfs

    The Planets

The Instrument