WASP-121 b JWST MIRI/LRS eclipse light curves, dayside spectra, and retrieval posterior distributions

This repository contains JWST eclipse light curves and spectra of the ultra-hot Jupiter WASP-121b, as well as diagnostic plots for the retrieval analysis with petitRADTRANS. The light curve was obtained with the open-source reduction pipeline Eureka!, and is provided in standard Eureka format. The JWST MIRI/LRS, NIRSpec/G395H, and NIRISS/SOSS spectra used in the analysis are provided in standard petitRADTRANS format. For MIRI/LRS and NIRISS/SOSS, the first column provides wavelength in micrometers, the second column eclipse depths, and the third column 1-sigma unceratinties. For NIRSpec/G395H, the first column provides wavelength in micrometers, the second column the bin width in micrometers, the thirs column the eclipse depths, and the fourth column 1-sigma unceratinties. The NIRISS dataset can be made available upon request. Posterior distributions for the petitRADTRANS retrievals of WASP-121b's joint dayside spectrum are provided as diagnostic plots. For information about the retirevals and data reduction, please refer to: Kahle et al. (submitted, 2026); Evans-Soma et al. (2025): https://arxiv.org/abs/2506.01771 Pelletier et al. (2025): https://arxiv.org/abs/2508.18341