CV

Full CV available here.

Education

• Ph.D. in Physics and Astronomy, University College London, 2023
  • Full thesis available in the UCL library or as a PDF.
  • See my Mathematics Genealogy Project tree generated with geneagrapher here, or see Astronomy Genealogy Project’s AstroGen tree here.
• MSci in Physics, Imperial College London, 2019

Research experience

• Apr. 2024 - Now: Postdoctoral Research Associate
  •    Institute for Computational Cosmology & Centre for Extragalactic Astronomy, Durham University (UK)
  •    Large scale structure, dark matter, dark energy, cosmological inference, simulation-based inference, strong and weak gravitational lensing observations, charge transfer inefficiency on the VIS instrument in the Euclid Space Telescope, and statistical techniques for medical cancer research (AI-VISION). Active member of Euclid (SWG Weak Lensing and VIS), Kilo-Degree Survey (KiDS), COSMOS-Web and Habitable Worlds Observatory.
• Jun. 2023 - Apr. 2024: Postdoctoral Research Fellow
  •    Cosmoparticle Initiative, University College London (UK)
  •    Development of forward models for large-scale structure measurements by the Euclid Space Telescope, and the Kilo-Degree Survey.
• Jun.-Aug. 2018: Research Intern
  •    ICIC, Astrophysics Group, Department of Physics, Imperial College London (UK)
  •    Development of a novel Bayesian method together with to analyse spectra of gamma rays detected by the Fermi LAT.
  •    Advisers: Dr Alex Geringer-Sameth, Prof. Roberto Trotta
• Jun.-Aug. 2017: Research Intern
  •    ICIC, Astrophysics Group, Department of Physics, Imperial College London (UK)
  •    Development of an outreach map containing the location in space of most objects ever discovered from the low Earth orbit to the edge of the observable.
  •    Adviser: Prof. Roberto Trotta
• Jul. 2015: Research Intern
  •    Instituto de Astrofísica de las Canarias, IAC (Spain)
  •    Observation nights on the Teide (Tenerife) with the IAC-80 telescope.
  •    Advisers: Dr Miquel Serra-Ricart, Juan Carlos Casado
• Jul. 2014: Research Intern
  •    Centro de Astrofisica da Universidade do Porto, CAUP (Portugal)
  •    Computational analysis of supernovae and Hubble parameter data.
  •    Adviser: Dr Carlos Martins

Leadership roles

• Apr. 2024-Now: Coordinator of the VIS charge-transfer inefficiency efforts
  •    Euclid consortium
  •    Execution and reporting of CTI calibration effort within OU-VIS.
• 2024-Now: Kilo-Degree Survey builder status
  •    KiDS consortium
• Jun. 2023-Now: Coordinator of variable depth modelling project
  •    Euclid consortium
  •    Execution and reporting of variable depth standard project within SGS LE3.
• Jan. 2021-Now: Coordinator simulation-based inference & forward modelling team
  •    KiDS consortium
  •    Execution and reporting of SBI and simulations for KiDS-1000 and Legacy.

Professional experience

• Dec. 2024-Now: Co-chair of the SOC & LOC for the ASTRODAT workshop
  •    Durham University (UK)
  •    Organisation of logistics and scientific content of the ASTRODAT workshop on coding and astrostatistics for early-career researchers hosted at Durham University in September 2025.
• Jul. 2025-Now: Chair of the SOC of gravtiational lensing National Astronomy Meeting session
  •    Durham University (UK)
  •    Organisation of scientific content of the "The Golden Era of Gravitational Lensing: from Micro to Macro" NAM session which covers three 1.5-hour blocks.
• Oct. 2024-Now: Creator & organiser of ‘Scraps of Science’ sessions
  •    Durham University (UK)
  •    Fortnightly session where all members of the astronomy group discuss current research.
• Oct. 2024-Now: Organiser of ‘Lensing Lunch’ sessions
  •    Durham University (UK)
  •    Fortnightly session to discuss and present gravitational lensing-related research.
• 2023-2025: Chair of conference talks: National Astronomy Meeting 2025, Euclid UK Meeting 2024, Kilo-Degree Survey Meeting 2021
  •    Chairing for contributed talks.
• 2023-2025: Journal referee, Monthly Notices to the Royal Astronomical Society and the Open Journal of Astrophysics
  •    Referee for papers submitted to MNRAS and OJA.
• May 2023: Organiser & chair of a conference for KiDS consortium
  •    UCL Observatory (UK)
  •    Organisation of a week-long KiDS consortium meeting and social activities.
• Sep. 2021 - Jun. 2022: Organiser of the cosmology journal club
  •    University College London (UK)
  •    Weekly cosmology journal club at UCL. Development and implementation of the “hybrid” format which combined remote and in-person attendance.
• Jan. - Jun. 2021: Organiser of the astrophysics lunch talks
  •    University College London (UK)
  •    Organisation and moderation of the twice-per-term talks by internal and external speakers.

Skills

• Proficient in, and comprehensive understanding of Python
• Proficient understanding of Python scientific packages such as numpy, scipy, pandas, and matplotlib
• Experienced in C++, bash, Mathematica and LaTeX
• Familiar with SQL, R and HTML
• Experienced in the use, deployment and development of machine learning algorithms/AI
• Implementation of parallel processes through MPI, OpenMP and multiprocessing
• Collaborative coding and version management through git
• Experienced in high-performance computing and cluster management
• Proficient in reading, writing, speaking and listening of English, German, Spanish and Catalan

Publications

Matter power spectrum reconstruction with KiDS-Legacy: Improved internal ΛCDM consistency and preference for strong baryonic feedback

Broxterman, J. C., Simon, P., Porth, L., Kuijken, K., Wright, A. H., Asgari, M., ... & von Wietersheim-Kramsta, M. (2025). Matter power spectrum reconstruction with KiDS-Legacy: Improved internal $\Lambda $ CDM consistency and preference for strong baryonic feedback. arXiv preprint arXiv:2509.08365.

Radiation damage to the Hubble Space Telescope during two Solar cycles, and correction of Charge Transfer Inefficiency

Massey, R., Kegerreis, J. A., Barrios, J. P. L. G., Nightingale, J. W., Hayes, R. G., Lagattuta, D., ... & von Wietersheim-Kramsta, M. (2025). Radiation damage to the Hubble Space Telescope during two Solar cycles, and correction of Charge Transfer Inefficiency. arXiv preprint arXiv:2509.05057.

Not so dark, not so dense: an alternative explanation for the lensing subhalo in SDSSJ0946+1006

He, Q., Robertson, A., Nightingale, J. W., Amvrosiadis, A., Cole, S., Frenk, C. S., ... & von Wietersheim-Kramsta, M. (2025). Not so dark, not so dense: an alternative explanation for the lensing subhalo in SDSSJ0946+ 1006. arXiv preprint arXiv:2506.07978.

Probing Dark Matter Substructures with Free-Form Modelling: A Case Study of the `Jackpot’ Strong Lens

Cao, Xiaoyue, Ran Li, James W. Nightingale, Richard Massey, Qiuhan He, Aristeidis Amvrosiadis, Andrew Robertson et al. "Probing Dark Matter Substructures with Free-Form Modelling: A Case Study of the Jackpot Strong Lens." arXiv preprint arXiv:2504.19177 (2025).

The “Little Dark Dot”: Evidence for Self-Interacting Dark Matter in the Strong Lens SDSSJ0946+1006?

Li, S., Li, R., Wang, K., Jia, Z., Cao, X., Frenk, C. S., ... & Ma, X. (2025). The" Little Dark Dot": Evidence for Self-Interacting Dark Matter in the Strong Lens SDSSJ0946+ 1006?. arXiv preprint arXiv:2504.11800.

KiDS-Legacy: Redshift distributions and their calibration

Wright, A. H., Hildebrandt, H., Busch, J. L. V. D., Bilicki, M., Heymans, C., Joachimi, B., ... & Zhang, Y. H. (2025). KiDS-Legacy: Redshift distributions and their calibration. arXiv preprint arXiv:2503.19440.

KiDS-Legacy: Cosmological constraints from cosmic shear with the complete Kilo-Degree Survey

Wright, A. H., Stölzner, B., Asgari, M., Bilicki, M., Giblin, B., Heymans, C., ... & Zhang, Y. H. (2025). KiDS-Legacy: Cosmological constraints from cosmic shear with the complete Kilo-Degree Survey. arXiv preprint arXiv:2503.19441.

KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes

Stölzner, B., Wright, A. H., Asgari, M., Heymans, C., Hildebrandt, H., Hoekstra, H., ... & Zhang, Y. H. (2025). KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes. arXiv preprint arXiv:2503.19442.

Euclid Quick Data Release (Q1): VIS processing and data products

McCracken, H. J., Benson, K., Dolding, C., Flanet, T., Grenet, C., Herent, O., ... & Martinet, N. (2025). Euclid Quick Data Release (Q1): VIS processing and data products. arXiv preprint arXiv:2503.15303.

The COSMOS-Web Lens Survey (COWLS) II: depth, resolution, and NIR coverage from JWST reveal 17 spectacular lenses

Mahler, G., Nightingale, J. W., Hogg, N. B., Gozaliasl, G., McCleary, J., He, Q., ... & Jin, S. (2025). The COSMOS-Web Lens Survey (COWLS) II: depth, resolution, and NIR coverage from JWST reveal 17 spectacular lenses. arXiv preprint arXiv:2503.08782.

The COSMOS-Web Lens Survey (COWLS) I: Discovery of >100 high redshift strong lenses in contiguous JWST imaging

Nightingale, J., Mahler, G., McCleary, J., He, Q., Hogg, N. B., Amvrosiadis, A., ... & Jin, S. (2025). The COSMOS-Web Lens Survey (COWLS) I: Discovery of> 100 high redshift strong lenses in contiguous JWST imaging. arXiv preprint arXiv:2503.08777.

Measuring the Stellar-to-Halo Mass Relation at ∼10^10 Solar masses, using space-based imaging of galaxy-galaxy strong lenses

Wang, K., Cao, X., Li, R., Nightingale, J. W., He, Q., Amvrosiadis, A., Massey, R., von Wietersheim-Kramsta, M., ... & Ma, X. (2025). Measuring the Stellar-to-Halo Mass Relation at $\sim10^{10} $ Solar masses, using space-based imaging of galaxy-galaxy strong lenses. arXiv preprint arXiv:2501.16139.

KiDS-Legacy: angular galaxy clustering from deep surveys with complex selection effects

Yan, Z., Wright, A. H., Chisari, N. E., Georgiou, C., Joudaki, S., Loureiro, A., ... & Yoon, M. (2024). KiDS-Legacy: angular galaxy clustering from deep surveys with complex selection effects. Astronomy & Astrophysics, 694, A259.

KiDS-Legacy: Covariance validation and the unified OneCovariance framework for projected large-scale structure observables

Reischke, R., Unruh, S., Asgari, M., Dvornik, A., Hildebrandt, H., Joachimi, B., ... & Tröster, T. (2024). KiDS-Legacy: Covariance validation and the unified OneCovariance framework for projected large-scale structure observables. Astronomy & Astrophysics, 699, A124.

6x2pt: Forecasting gains from joint weak lensing and galaxy clustering analyses with spectroscopic-photometric galaxy cross-correlations

Johnston, H., Chisari, N. E., Joudaki, S., Reischke, R., Stölzner, B., Loureiro, A., ... & Zhang, Y. H. (2024). 6x2pt: Forecasting gains from joint weak lensing and galaxy clustering analyses with spectroscopic-photometric galaxy cross-correlations. Astronomy & Astrophysics, 699, A127.

Euclid. I. Overview of the Euclid mission

Mellier, Y., Barroso, J. A., Achúcarro, A., Adamek, J., Adam, R., Addison, G. E., ... & Bruton, S. (2024). Euclid. I. Overview of the Euclid mission. Astronomy & Astrophysics, 697, A1.

KiDS-SBI: Simulation-Based Inference Analysis of KiDS-1000 Cosmic Shear

von Wietersheim-Kramsta, M., Lin, K., Tessore, N., Joachimi, B., Loureiro, A., Reischke, R., & Wright, A. H. (2025). KiDS-SBI: Simulation-Based Inference Analysis of KiDS-1000 Cosmic Shear. Astronomy & Astrophysics, 694, A223.

A simulation-based inference pipeline for cosmic shear with the Kilo-Degree Survey

Lin, K., von Wietersheim-Kramsta, M., Joachimi, B., & Feeney, S. (2023). A simulation-based inference pipeline for cosmic shear with the Kilo-Degree Survey. Monthly Notices of the Royal Astronomical Society, 524(4), 6167-6180.

GLASS: Generator for Large Scale Structure

Tessore, N., Loureiro, A., Joachimi, B., von Wietersheim-Kramsta, M., & Jeffrey, N. (2023). GLASS: Generator for Large Scale Structure. The Open Journal of Astrophysics, 6, 11.

KiDS-1000: Constraints on the intrinsic alignment of luminous red galaxies

Fortuna, M. C., Hoekstra, H., Johnston, H., Vakili, M., Kannawadi, A., Georgiou, C., ... & Von Wietersheim-Kramsta, M. (2021). KiDS-1000: Constraints on the intrinsic alignment of luminous red galaxies. Astronomy & Astrophysics, 654, A76.

Magnification bias in galaxy surveys with complex sample selection functions

von Wietersheim-Kramsta, M., Joachimi, B., van den Busch, J. L., Heymans, C., Hildebrandt, H., Asgari, M., ... & Wright, A. H. (2021). Magnification bias in galaxy surveys with complex sample selection functions. Monthly Notices of the Royal Astronomical Society, 504(1), 1452-1465.

KiDS-1000 methodology: Modelling and inference for joint weak gravitational lensing and spectroscopic galaxy clustering analysis

Joachimi, B., Lin, C. A., Asgari, M., Tröster, T., Heymans, C., Hildebrandt, H., ... & Zuntz, J. (2021). KiDS-1000 methodology: Modelling and inference for joint weak gravitational lensing and spectroscopic galaxy clustering analysis. Astronomy & Astrophysics, 646, A129.

Dark energy and equivalence principle constraints from astrophysical tests of the stability of the fine-structure constant

Martins, C. J. A. P., Pinho, A. M. M., Alves, R. F. C., Pino, M., Rocha, C. I. S. A., & von Wietersheim, M. (2015). Dark energy and equivalence principle constraints from astrophysical tests of the stability of the fine-structure constant. Journal of Cosmology and Astroparticle Physics, 2015(08), 047.