Document Collection Contents The document collection contains documentation files, where available, for this bundle. All document files will have an accompanying label file to describe content and structure. Label files have the same name as the main document file, with an extension of ".xml". gartrelle_etal_2020_d_type_spectral_thumbmails.pdf - Gartrelle et al. IRTF Asteroid Spectra Thumbnails of 25 D-Type Asteroids - This file contains thumbnail VNIR (0.7-2.45 micron) spectra of 25 D-type asteroids obtained at NASA/IRTF using the SpeX instrument in low-resolution Prism mode and the 0.8 X 15" slit. The observations were conducted between 2016-2019. bundle_description.txt - Bundle description for the gbo.ast-dtype.gartrelleetal.irtf.spectra bundle - A document describing the content and structure of the bundle. ref.txt - Reference List - The reference list for the bundle. observatory.mauna_kea.txt - Description document for Mauna Kea Observatory - Description document for Mauna Kea Observatory irtf.3m0.txt - Description for 3.0-m NASA Infrared Telescope Facility (IRTF) at Mauna Kea Observatory - Description for 3.0-m NASA Infrared Telescope Facility (IRTF) at Mauna Kea Observatory telescope.spex.irtf3m0.txt - Description Document for SpeX - A description of the SpeX instrument AA_Document_Index.txt - Document Index - The file you are reading. collection_gbo.ast-dtype.gartrelleetal.irtf.spectra_document_inventory.csv - Collection Inventory - An inventory of document products in this collection.