composite_spectra.fits: 684 composite spectra constructed from the clusters, re-sampled to shared loglambda wavelength (extension 'LOGLAMBDA') arrayclusters.fits: SDSS plate-mjd-fiber of quasar spectra within each cluster, cluster # corresponds to its index in FLUX/IVAR extension of composite_spectra.fitsrrtemplate-qso-6vec.fits: quasar eigenspectra modelplotmodel.py: example code for navigating eigenspectra file and plotting eigenvectors