Archive of Exoplanet Transmission Spectra

Exoplanet Transmission Archive
This figure shows all 39 planets listed in the Archive ordered by their SNR from the exo.MAST Observability Table (Mullally et al. 2019, RNAAS)

This page contains downloadable .txt files of the published transmission spectra from peer reviewed papers.

Each .txt file has been compiled individually from the published tables by Dr Hannah Wakeford. Each dataset is converted into the same units and formats from the original publications for better comparison. Where possible I am attempting to update the file headers with added information from the papers including values used for the period, inclination, and a/R*.

Wavelength (µm) | Wavelength uncertainty (µm) | (Rp/R*)^2 | (Rp/R*)^2 uncertainty

The files are listed in alphabetical order of planet name. In some cases multiple files correspond to the same planet, these are listed individually when taken from separate publications.

Each file links to a dropbox file and any changes made by Dr Wakeford automatically update the files. For latest updates see end of page.

This total list is not complete and is updated whenever possible by Dr Hannah Wakeford.

A number of these are also available on as part of a database populated by Dr Wakeford, however, as this can only be updated periodically by the MAST team at STScI the full archive is presented here for the community to use freely.

If you would like something added to the list please contact Dr Wakeford with the publication containing the table of transmission spectrum data.

Figures of the spectra:

WFC3 G141 population studies:

There have been a number of studies in the literature looking specifically at the data from Hubble’s WFC3 G141 grism which spans 1.1-1.7 microns. Some of the biggest datasets come from large proposals such as GO-14260 (PI D. Deming) and PanCET GO-14767 (PI D.K. Sing & M. Lopez-Morales). These data have been extensively used by the community to understand the muting and obscuration of molecular absorption features in exoplanet transmission spectra. See Iyer et al. (2016), Stevenson et al. (2016), Fu et al. (2017), Wakeford et al. (2019).

  • Zip file of the data presented in Tsiaras et al. (2018) – this study extracted and reduced the data for 30 exoplanets, each transmission spectrum is presented in individual files in the .zip each header lists the associated observing program – as no statistical conclusions were drawn in this study it is not included in the list above but still falls under the G141 population study results subheading.


08-2020: Added subsection on population studies over Hubble’s WFC3 IR G141 bandpass including links to data files from Tsiaras et al. (2018).

07-2020: Added information on analysis parameters for the first 5 files or so.

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