The Extended Atlas of Low-Resolution Spectra from the Infrared Astronomical Satellite

G.C. Sloan (STScI, UNC), K.E. Kraemer (Boston College), K. Volk (STScI)

2025, ApJ, submitted

We present an updated atlas of spectra from the Low-Resolution Spectrometer (LRS) on the Infrared Astronomical Satellite (IRAS), which took spectra from 7.67 to 22.73 µm with a spectral resolving power (λ/Δλ) of 20-60. The updated atlas includes 11,238 spectra, including 5,425 spectra published in the original LRS Atlas, 5,796 spectra published in three later papers, and 17 spectra previously available online but not published. The updated atlas has significantly more sources close to the Galactic plane than the original Atlas. We have applied an improved spectral correction to remove an artifact at 8 µm in the original database. While the IRAS mission flew over 40 years ago, the extended LRS atlas remains the single most complete database of mid-infrared spectra of nearby and bright objects in the Galaxy.

The full atlas and ancillary data will be available at IRSA. Meanwhile, they are also available locally.

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Last modified 11 March, 2025. © Gregory C. Sloan and others.