cv
Basics
| Name | William D'Arcy Kenworthy |
| Label | Quantitative Researcher |
| darcy-at-darcykenworthy.com | |
| Phone | +1 (704) 497-7230 |
| Url | https://darcykenworthy.com |
| Summary | PhD-trained data scientist with expertise in statistical modeling, large-scale data analysis, and systematic uncertainty correction. Experience developing analytical frameworks adopted across international research collaborations. Seeking to leverage my expertise in statistical modeling towards solving problems in energy, healthcare, and markets. |
Work
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2022.01 - 2025.12 Postdoctoral Researcher
Oskar Klein Center, Stockholm University
Advisor: Ariel Goobar
- Worked on the Zwicky Transient Facility, release of largest-to-date sample of cosmological supernovae
- Analyzed large datasets using statistical models to extract systematic patterns and correct for measurement biases
- Developed and validated predictive models for time-series data with sub-percent precision requirements
- Collaborated with international teams on data processing pipelines and uncertainty propagation methods
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2017.01 - 2022.01 Graduate Research Assistant
Johns Hopkins University
Advisor: Adam Riess (Nobel Laureate)
- Worked on measurement of the Hubble constant and dark energy using Type Ia supernovae
- Developed SALT3 statistical modeling framework for analyzing observational time-series data
- Created methods for systematic bias identification and correction in large-scale measurement campaigns
- Implemented Bayesian statistical models for parameter estimation with highly correlated uncertainties
Education
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2017.01 - 2019.01 Baltimore, MD, USA
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2017.01 - 2022.01 Baltimore, MD, USA
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2016.01 - 2017.01 Cambridge, UK
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2013.01 - 2017.01 Cambridge, UK
Publications
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2025.01.01 ZTF SN Ia DR2: Improved SN Ia colors through expanded dimensionality with SALT3+
Astronomy & Astrophysics
Kenworthy, W. D., Goobar, A. et al., 2025, A&A, 697, 125
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2025.01.01 A Reassessment of the Pantheon+ and DES 5YR Calibration Uncertainties: Dovekie
arXiv:2506.05471
Popovic, B., Kenworthy, W. D., et al., in review
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2024.01.01 Impact of Peculiar Velocities on Measurements of H₀
Springer Series
Kenworthy, W. D., Davis, T. M., Invited book chapter
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2022.01.01 Measurements of the Hubble Constant with a Two-rung Distance Ladder: Two Out of Three Ain't Bad
The Astrophysical Journal
Kenworthy, W. D., Riess, A. et al., 2022, ApJ, 985, 83
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2021.01.01 SALT3: An Improved Type Ia Supernova Model for Measuring Cosmic Distances
The Astrophysical Journal
Kenworthy, W. D., Jones, D. O., et al., 2021, ApJ, 923, 265
Skills
| Programming | |
| Python (data analysis, photometry) | |
| Stan (statistical modeling) | |
| JAX/Equinox (high-speed computation) |
| Data Analysis | |
| Large-scale dataset processing | |
| Statistical modeling | |
| Uncertainty quantification | |
| Systematic bias correction | |
| Model validation |
| Side Projects | |
| Swift | |
| Julia | |
| ML |
| Modeling | |
| Time series analysis | |
| Bayesian statistics | |
| Simulation-based inference |
| Tooling | |
| AWS | |
| Git | |
| Mercurial |