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Database Downloads

All data in the NASA Ames PAH IR Spectroscopic Database are freely available for download. We do ask you to provide a valid e-mail address in order to track the users of the data.

If this is the first time you use this form, please also provide your full and company's name. Otherwise you can keep these fields blank.

Please specify your download. You will receive an e-mail at the address you specified with a link to the data.


Complete database:

Clusters database:

I agree to reference Bauschlicher+ (2018), Boersma+ (2014), Mattioda+ (2020) and the appropriate individual references when using these data.

Software Downloads

Three software downloads are available; the AmesPAHdbIDLSuite, the AmesPAHdbPythonSuite and pyPAHdb, which significantly extend the tools available online. Their development is done on GitHub and comprehensive guides on installing and using these software can be found via the Documentation Portal.


The AmesPAHdbIDLSuite is a collection of classes utilizing IDL*'s object programming capabilities and can be used to work with downloaded database XML-files offline on your own machine.


*IDL is a registered trademark of Harris Geospatial


The AmesPAHdbPythonSuite is a Python package to work with downloaded database XML-files offline on your own machine.



pyPAHdb is a Python package specifically aimed at fitting and decomposing astronomical PAH emission spectra and is being developed as part of the awarded James Webb Space Telescope (JWST) Early Release Science (ERS) program titled "Radiative Feedback from Massive Stars as Traced by Multiband Imaging and Spectroscopic Mosaics" (ID: 1288).


You are kindly asked to consider the following references for citation when using the database:

700 species present in version 2.00 of the theoretical database (Oct 29, 2013)