Both observed and synthetic spectra are available to synphot users. ... The first three columns contain, respectively, the catalog reference, the type of objects, and whether the spectra are models or observed. Column 4 provides the sample syntax for accessing these spectra: in some cases, a filename must be provided, and in others, use of the synphot function cat or icat can be used. ... Model or Observed . ... Stars . Observed . ... Pickles 1998 . ... Deprecated/ Use Pickles 1998 instead . ...