Pandeia Reference Data
Information about JWST reference data and how to find the source of the reference data from the reference data files is provided in this article.
Types of reference data
The JWST ETC reference data folder contains a number of types of data, including:
- Background spectra
- Extinction spectra
- Throughput files for JWST
- Normalization bandpasses (except HST filters, in the Synphot data package)
- PSF datasets, for all instrument configurations.
- Source spectral definitions (most template and model grid spectra is in the Synphot data package)
The JWST throughput files are found in the Pandeia data directory at "$pandeia_refdata/jwst/". Each instrument is in its own subdirectory, along with general telescope and detector information. The origin of particular reference data can often be found in the "config.json" file within a directory. For example, in "$pandeia_refdata/jwst/miri/config.json", lines 1743–1780 show the source information as follows:
The spectral libraries used by Pandeia are also found in the reference data directory, inside the "$pandeia_refdata/sed" subdirectory.
General information can be found in "$pandeia_refdata/sed/config.json", while information about individual sources can be found at "$pandeia_refdata/sed/<type>/spectra.json", where "<type>" is an available spectrum type such as "brown2014" for the Brown et al. (2014) galaxy spectra. In the case of the Brown et al. galaxy spectra, the "README" file also contains useful information on the source of the spectra:
With the exception of the "hst_calspec" spectra, all of the actual spectrum FITS files are in the Synphot dataset, and only configuration files that map names to filenames exist in the "$pandeia_refdata" directories.
Brown, M. J. I. et al. 2014, ApJS, 212, 18
An Atlas of Galaxy Spectral Energy Distributions from the Ultraviolet to the Mid-Infrared