We present 33 observations from 2.2-4.0 µm of eight large (D > 200 km) asteroids from the C spectral complex, with spectra inconsistent with the hydrated minerals we see in meteorites.
The data, found in a gzipped tarfile, have three columns: wavelength, normalized reflectance, and uncertainty. They have been resampled to a resolution of 0.01 µm, and have been trimmed to remove the 2.5-2.85 µm region (which is severely compromised by the Earth's atmosphere). In addition to the 33 new spectra, three additional spectra are referenced in the paper and included here: 24 Themis, 2 Pallas, and 51 Nemausa.
36 spectra from "Infrared Spectroscopy of Large, Low-Albedo Asteroids: Are Ceres and Themis Archetypes or Outliers?" by Rivkin et al., as gzipped tarfile.