Erebus documentation

Erebus is a rocky-exoplanet secondary eclipse aperture-photometry lightcurve fitting pipeline made for use with the Mid Infra-Red Instrument aboard the James Webb Space Telescope, starting with calints.fits files available on the Barbara A. Mikulski Archive for Space Telescopes.

For issue reporting or feedback suggestions click here.

For the setup used when writing Connors et al. (in prep) click here.

If you use Erebus in a scientific publication we will ask you cite our paper:

@ARTICLE{2025arXiv250702052C,
       author = {{Connors}, Nicholas J. and {Monaghan}, Christopher and {Benneke}, Bj{\"o}rn and {Dang}, Lisa},
        title = "{Uniform Reanalysis of JWST MIRI 15{\ensuremath{\mu}}m Exoplanet Eclipse Observations using Frame-Normalized Principal Component Analysis}",
      journal = {arXiv e-prints},
     keywords = {Earth and Planetary Astrophysics, Instrumentation and Methods for Astrophysics},
         year = 2025,
        month = jul,
          eid = {arXiv:2507.02052},
        pages = {arXiv:2507.02052},
          doi = {10.48550/arXiv.2507.02052},
archivePrefix = {arXiv},
       eprint = {2507.02052},
 primaryClass = {astro-ph.EP},
       adsurl = {https://ui.adsabs.harvard.edu/abs/2025arXiv250702052C},
      adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}

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Changelog

0.7.1

• Now uses ecosw and esinw instead of e and w
• Add optional setting to fix eclipse timing
• Improved convergence checking

0.7.0

• Pre-processing of calints data for NaN and outlier rejection.
• Light curve fitting using FN-PCA, exponential ramp, or custom systematic model
• Fits for orbital parameters within provided errors. Support for t0 predictions from lookup file.
• Version used in Connors et al (in prep)