![An example RV fit with Alfred on the TOI-6054 system (M. A. Kroft et al. 2025), with Gaussian priors on the planets’ periods and conjunction times. This fit demonstrates Alfred’s ability to fit multiple planets and multiple datasets simultaneously, as well as handle eccentricity and user-defined priors. This plot is the default output from an RV fit with Alfred.-- [astro-ph.IM]](https://i0.wp.com/astrobiology.com/wp-content/uploads/2026/08/Alfred.png?fit=1200%2C675&ssl=1)
[astro-ph.IM] In the era of TESS, exoplanet follow-up and confirmation have become a massive community effort.
With only about an eighth of the over 8,000 TESS exoplanet candidates confirmed, astronomers need flexible software to allow them to characterize many different kinds of systems with data from multiple telescopes and instruments.
In this work, I present Alfred (the Awesome Library For Robust Exoplanet Detection), an open-source Python package for exoplanet detection and confirmation. Alfred is designed to be flexible and easy to use, allowing users to fit transit and radial velocity data for an arbitrary system of exoplanets.
The code is released under an MIT license on GitHub (https://github.com/maxkroft/Alfred ) and is installable via pip, with documentation under active development (https://astrobiology.com/wp-admin/post.php?post=61821&action=edit).
Maxwell A. Kroft
Comments: Published by Research Notes of the AAS
Subjects: Instrumentation and Methods for Astrophysics (astro-ph.IM); Earth and Planetary Astrophysics (astro-ph.EP)
Cite as: arXiv:2608.26227 [astro-ph.IM] (or arXiv:2608.26227v1 [astro-ph.IM] for this version)
https://doi.org/10.48550/arXiv.2608.26227
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Journal reference: Maxwell A. Kroft 2026, RNAAS 10 7 219
Related DOI:
https://doi.org/10.3847/2515-5172/ae9165
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Submission history
From: Maxwell Kroft
[v1] Wed, 26 Aug 2026 16:02:28 UTC (633 KB)
https://arxiv.org/abs/2608.26227
Astrobiology
