CRIRES+ and CARMENES reduced spectroscopic observations of TOI-2109

This records contains the reduced data as used in the publication of Cont et al. 2025 "Retrieving day- and nightside atmospheric properties of the ultra-hot Jupiter TOI-2109b. Detection of Fe and CO emission lines and evidence for inefficient heat transport" currently in press with Astronomy & Astrophysics and available as preprint on arXiv.

Links to the publication:

1. ADS: TBD
2. arXiv: TBD

The data reduction steps for CRIRES+ and CARMENES data are explained in sect. 2 of the article

Acknowledgements

If you make use of this data in your research, please cite the Cont et al. 2025 article and this record with its DOI (10.5281/zenodo.15037659) and its reference, the bibtex reference is:

@dataset{lavail_2025_15037659,
  author       = {Lavail, Alexis},
  title        = {CRIRES+ and CARMENES reduced spectroscopic
                   observations of TOI-2109
                  },
  month        = mar,
  year         = 2025,
  publisher    = {Zenodo},
  version      = {1.0},
  doi          = {10.5281/zenodo.15037659},
  url          = {https://doi.org/10.5281/zenodo.15037659},
}

Note also that ESO requests an acknowledgement, which in this case would be: "Based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme ID 113.26GE".

This data is released under a Creative Commons Attribution 4.0 International license.

CRIRES+ data

The CRIRES+ data is following the same format as other records such as https://zenodo.org/records/11637332. The CRIRES+ data files are the following :

• 240408_TOI2109.pickle
• 240408_TOI2109_order1.pickle
• 240409_TOI2109.pickle
• 240409_TOI2109-order1.pickle
• 240526_TOI2109.pickle
• 240526_TOI2109-order1.pickle

The standard files for each date are named YYMMDD_TOI2109.pickle. They contain the full spectrum, except the part of the first spectral order on the left-most detector. That wavelength segment is not reduced by default by the pipeline because it is slightly out of the detector on one of the nodding position. We used a custom reduction to be able to reduce this order, and it is contained in the YYMMDD_TOI2109-order1.pickle files. The reduction was done on a restricted fraction of the slit.

CARMENES data

The CARMENES reduced spectra are in the TOI2109.zip archive. The archive contains a README file (README_TOI2109.txt) explaining the data.