Data release: Measuring orbital eccentricity with SEOBNRv6EHM

Posterior samples from the parameter-estimation analyses presented in:

L. Pompili, A. Gamboa, and A. Buonanno, Eccentric and unbound compact binaries in the LIGO--Virgo--KAGRA catalog: parameter estimation and waveform systematics with SEOBNRv6EHM (2026): arXiv:2605.28716

Contents

The data release contains 27 HDF5 result files, one per gravitational-wave event analyzed with the SEOBNRv6EHM waveform model. The files contain the results of eccentric aligned-spin parameter-estimation analyses for events spanning the O1–O4 LIGO–Virgo–KAGRA observing runs, including binary black hole, neutron-star–black-hole, and binary neutron star mergers.

Each file is a Bilby result object stored in HDF5 format. It can be loaded with:

import bilby
result = bilby.read_in_result("samples/GW150914_v6EHM_result.hdf5")
posterior = result.posterior

The notebook load_results.ipynb shows how to load and plot the samples.

Citation

If you use these data, please cite the accompanying paper arXiv:2605.28716:

@article{Pompili:2026yxq,
    author = "Pompili, Lorenzo and Gamboa, Aldo and Buonanno, Alessandra",
    title = "{Eccentric and unbound compact binaries in the LIGO-Virgo-KAGRA catalog: parameter estimation and waveform systematics with SEOBNRv6EHM}",
    eprint = "2605.28716",
    archivePrefix = "arXiv",
    primaryClass = "gr-qc",
    month = "5",
    year = "2026"
}

as well as the SEOBNRv6EHM model paper arXiv:2605.28715:

@article{Gamboa:2026jht,
    author = "Gamboa, Aldo and others",
    title = "{Accurate waveforms for generic planar-orbit binary black holes: The multipolar effective-one-body model SEOBNRv6EHM}",
    eprint = "2605.28715",
    archivePrefix = "arXiv",
    primaryClass = "gr-qc",
    month = "5",
    year = "2026"
}