Synphot Data User's Guide
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| Synphot Data User's Guide | ||||
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A.1 Introduction to all available spectral catalogs
Both observed and synthetic spectra are available to synphot users. Table A.1 summarizes the contents, access mode, and status of the available catalogs.
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. These functions allow access by specifying model parameters (effective temperature, metallicity, log gravity); the difference between the cat() and icat() functions is that cat() selects the spectrum closest matching the specified parameters while icat() interpolates between models that bracket the specified parameters.
Column 5 indicates whether the catalog is recommended or deprecated, with an alternative recommended in the case of deprecated catalogs. A blank entry in this column indicates that there may be more recent catalogs available in the literature which have not been incorporated into the synphot catalog set. Deprecated catalogs remain available to guarantee work continuity and to make comparison checks between older and newer spectra available.
Table A.1: Summary of all Spectra Available in Synphot and Related Information. See text for details.
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Space Telescope Science Institute http://www.stsci.edu Voice: (410) 338-1082 help@stsci.edu |
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