Some key SDSS products still rely on data stored in a subversion (a.k.a. SVN) repository. The full list of SVN repositories with data used by SDSS can be found on svn.sdss.org/public/ but a few that are key to SDSS pipelines are highlighted here.
While SDSS is transitioning to a robotic fiber positioning system, DR18 contains newly released plate data. The
platelist repository contains a wealth of data about all SDSS plates, including everything from input targets to plugmaps from when the plate was observed.
elodie repository contains a set of high and medium-resolution stellar spectra from Prugniel+, 2001. These are used by the BOSS idlspec2d pipeline’s spec1d analysis code to classify stars and determine a limited set of stellar parameters.
specflat repository contains the master calibration files and bad pixel masks utilized by the BOSS idlspec2d pipeline.
dust repository contains a number of dustmaps, including the SFD dust maps used by the BOSS idlspec2d pipeline.