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
• 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

• Jan. 2026 - May. 2026: Co-chair of the SOC & LOC for the Next Frontier in Medical Data 2026 interdisciplinary colloquium
  •    Durham University (UK)
  •    Organisation of logistics and scientific content of the "The Next Frontier in Medical Data 2026: Interdisciplinary Approaches from Maths and Physical Sciences" colloquium hosted at Durham University in September 2025.
• 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 - 2026: Journal referee, Monthly Notices to the Royal Astronomical Society, Astronomy & Astrophysics, and the Open Journal of Astrophysics
  •    Referee for papers submitted to MNRAS, A&A, and OJA.
• Dec. 2024 - Sep. 2025: 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.
• Oct. 2025 - Jul. 2025: 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.
• 2023 - 2025: Chair of conference talks: National Astronomy Meeting 2025, Euclid UK Meeting 2024, Kilo-Degree Survey Meeting 2021
  •    Chairing for contributed talks.
• May 2023: Organiser & chair of the KiDS consortium conference
  •    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

Main/corresponding author

An analytical model for non-local stochastic field-level galaxy bias on the sphere

von Wietersheim-Kramsta, M., Tessore, N., Joachimi, B., Hang, Q., Jeffrey, N., & Schaye, J. (2026). An analytical model for non-local stochastic field-level galaxy bias on the sphere. arXiv, arXiv:2610.12259.

KiDS-SBI: Simulation-based inference analysis of KiDS-1000 cosmic shear

von Wietersheim-Kramsta, M., Lin, K., Tessore, N., Joachimi, B., Loureiro, A., ..., & Wright, A.H. (2024). KiDS-SBI: Simulation-based inference analysis of KiDS-1000 cosmic shear. A&A, 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. (2022). A simulation-based inference pipeline for cosmic shear with the Kilo-Degree Survey. MNRAS, 524(4), 6167.

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., ..., & Wright, A.H. (2021). Magnification bias in galaxy surveys with complex sample selection functions. MNRAS, 504(1), 1452.

Contributing author

Radiation damage to the Hubble Space Telescope has been several years out of phase with the Solar cycle

Leroy, G., Barrios, J.P.L.G., von Wietersheim-Kramsta, M., Massey, R., Hayes, R.G., ..., & Vecchi, F. (2026). Radiation damage to the Hubble Space Telescope has been several years out of phase with the Solar cycle. arXiv, arXiv:2608.18214.

Early Exploration of the Scientific Discovery Space for the Habitable Worlds Observatory

Dressing, C.D., Adams, D., Alecian, E., Anand, G., Arney, G., ..., von Wietersheim-Kramsta, M., ..., & Zelakiewicz, A.S. (2026). Early Exploration of the Scientific Discovery Space for the Habitable Worlds Observatory. arXiv, arXiv:2608.11294.

Field-level weak lensing cosmology with 60 simulations using multifidelity simulation-based inference

Saoulis, A.A., Lin, K., Jeffrey, N., von Wietersheim-Kramsta, M., Piras, D., ..., & Joachimi, B. (2026). Field-level weak lensing cosmology with 60 simulations using multifidelity simulation-based inference. MNRAS.

Detection of a dark matter subhalo in the strongly lensed system PJ011646

Amvrosiadis, A., Nightingale, J.W., He, Q., Robertson, A., Cole, S., ..., von Wietersheim-Kramsta, M., ..., & Fung, L.W.H. (2026). Detection of a dark matter subhalo in the strongly lensed system PJ011646. arXiv, arXiv:2605.21212.

An ultra-high-resolution map of (dark) matter

Scognamiglio, D., Leroy, G., Harvey, D., Massey, R., Rhodes, J., ..., von Wietersheim-Kramsta, M., ..., & Weaver, J.R. (2026). An ultra-high-resolution map of (dark) matter. NatAs, 10, 573.

Transformational astrophysics and exoplanet science with Habitable Worlds Observatory’s High Resolution Imager

Van Eylen, V., Massey, R., Awan, S., Bartlett, J., Bradley, L., ..., von Wietersheim-Kramsta, M., ..., & Weeks, A. (2025). Transformational astrophysics and exoplanet science with Habitable Worlds Observatory's High Resolution Imager. arXiv, arXiv:2512.16416.

Radiation damage to the Hubble Space Telescope during two solar cycles, and correction of charge transfer inefficiency using ArCTIc

Massey, R., Kegerreis, J.A., Barrios, J.P.L.G., Nightingale, J.W., Hayes, R.G., ..., & von Wietersheim-Kramsta, M. (2025). Radiation damage to the Hubble Space Telescope during two solar cycles, and correction of charge transfer inefficiency using ArCTIc. MNRAS, 546(2), staf2186.

Not So Dark, Not So Dense: An Alternative Explanation for the Lensing Subhalo in SDSS J0946+1006

He, Q., Robertson, A., Nightingale, J.W., Amvrosiadis, A., Cole, S., ..., & von Wietersheim-Kramsta, M. (2025). Not So Dark, Not So Dense: An Alternative Explanation for the Lensing Subhalo in SDSS J0946+1006. ApJL, 991(2), L53.

Probing dark matter substructures with free-form modelling: a case study of the ‘Jackpot’ strong lens

Cao, X., Li, R., Nightingale, J.W., Massey, R., He, Q., ..., von Wietersheim-Kramsta, M., ..., & Gao, L. (2025). Probing dark matter substructures with free-form modelling: a case study of the 'Jackpot' strong lens. MNRAS, 545(4), staf2179.

The “Little Dark Dot”: Evidence for Self-interacting Dark Matter in the Strong Lens SDSS J0946+1006?

Li, S., Li, R., Wang, K., Jia, Z., Cao, X., ..., von Wietersheim-Kramsta, M., ..., & Ma, X. (2025). The "Little Dark Dot": Evidence for Self-interacting Dark Matter in the Strong Lens SDSS J0946+1006?. ApJ, 994(2), 201.

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

Wright, A.H., Stölzner, B., Asgari, M., Bilicki, M., Giblin, B., ..., von Wietersheim-Kramsta, M., ..., & Zhang, Y. (2025). KiDS-Legacy: Cosmological constraints from cosmic shear with the complete Kilo-Degree Survey. A&A, 703, A158.

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

Euclid Collaboration, McCracken, H.J., Benson, K., Dolding, C., Flanet, T., ..., von Wietersheim-Kramsta, M., ..., & Scott, D. (2026). Euclid Quick Data Release (Q1): II. VIS processing and data products. A&A, 711, A2.

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

Nightingale, J.W., Mahler, G., McCleary, J., He, Q., Hogg, N.B., ..., von Wietersheim-Kramsta, M., ..., & Jin, S. (2025). The COSMOS-Web Lens Survey (COWLS) I: discovery of >100 high redshift strong lenses in contiguous JWST imaging. MNRAS, 543(1), 203.

Measuring the stellar-to-halo mass relation at ∼10¹⁰ solar masses, using forthcoming space-based imaging of galaxy─galaxy strong lenses

Wang, K., Cao, X., Li, R., Nightingale, J.W., He, Q., ..., von Wietersheim-Kramsta, M., ..., & Ma, X. (2025). Measuring the stellar-to-halo mass relation at ∼10¹⁰ solar masses, using forthcoming space-based imaging of galaxy─galaxy strong lenses. MNRAS, 546(2), staf2253.

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., ..., von Wietersheim-Kramsta, M., ..., & Yoon, M. (2024). KiDS-Legacy: Covariance validation and the unified ONECOVARIANCE framework for projected large-scale structure observables. A&A, 699, A124.

6 × 2 pt: 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., ..., von Wietersheim-Kramsta, M., ..., & Zhang, Y. (2024). 6 × 2 pt: Forecasting gains from joint weak lensing and galaxy clustering analyses with spectroscopic-photometric galaxy cross-correlations. A&A, 699, A127.

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. OJAp, 6, 11.

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

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

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

Joachimi, B., Lin, C., Asgari, M., Tröster, T., Heymans, C., ..., von Wietersheim-Kramsta, M., ..., & Zuntz, J. (2020). KiDS-1000 methodology: Modelling and inference for joint weak gravitational lensing and spectroscopic galaxy clustering analysis. A&A, 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.

Authorship resulting from infrastructure contributions

Euclid Quick Data Release (Q1). Data processing for intracluster light measurements

Euclid Collaboration, Bamford, S.P., Gao, H., Hatch, N.A., Kolcu, T., ..., von Wietersheim-Kramsta, M., ..., & Knapen, J.H. (2026). Euclid Quick Data Release (Q1). Data processing for intracluster light measurements. arXiv, arXiv:2610.29682.

Euclid Bypass end-to-end simulations for spectroscopic galaxy clustering performance assessment

Euclid Collaboration, Granett, B.R., de la Torre, S., Moresco, M., Farina, A., ..., von Wietersheim-Kramsta, M., ..., & Scott, D. (2026). Euclid Bypass end-to-end simulations for spectroscopic galaxy clustering performance assessment. arXiv, arXiv:2610.26990.

Euclid Quick Data Release (Q1) Euclid spectroscopy of quasars. 2. Physical properties from spectral fitting

Euclid Collaboration, Calhau, J., Calderone, G., Feltre, A., Scialpi, M., ..., von Wietersheim-Kramsta, M., ..., & Wright, A.H. (2026). Euclid Quick Data Release (Q1) Euclid spectroscopy of quasars. 2. Physical properties from spectral fitting. arXiv, arXiv:2609.20947.

Euclid. A two-point correlation approach to diagnosing star-related systematics in the Euclid spectroscopic survey

Euclid Collaboration, Risso, I., Granett, B.R., Branchini, E., Veropalumbo, A., ..., von Wietersheim-Kramsta, M., ..., & Wright, A.H. (2026). Euclid. A two-point correlation approach to diagnosing star-related systematics in the Euclid spectroscopic survey. arXiv, arXiv:2609.05155.

Euclid preparation. The shape of halo profiles in $Λ$CDM and non-standard cosmologies

Euclid Collaboration, Pizzuti, L., Ferron, G.Y., Ragagnin, A., Le Brun, A.M.C., ..., von Wietersheim-Kramsta, M., ..., & Yeung, H.W. (2026). Euclid preparation. The shape of halo profiles in $Λ$CDM and non-standard cosmologies. arXiv, arXiv:2609.04192.

Euclid preparation: CV. CosmoPostProcess: A simulation calibrated framework for weak lensing selection bias in richness-selected galaxy clusters

Euclid Collaboration, Ingrao, R., Costanzi, M., Castro, T., Saro, A., ..., von Wietersheim-Kramsta, M., ..., & Wright, A.H. (2026). Euclid preparation: CV. CosmoPostProcess: A simulation calibrated framework for weak lensing selection bias in richness-selected galaxy clusters. A&A, 713, A256.

Euclid: VIII. Populating a dark universe using SciPIC

Euclid Collaboration, Gonzalez, E.J., Carretero, J., Baghkhani, Z., Castander, F.J., ..., von Wietersheim-Kramsta, M., ..., & Yeung, H.W. (2026). Euclid: VIII. Populating a dark universe using SciPIC. A&A, 712, A90.

Euclid preparation. Baryon acoustic oscillations extraction techniques: comparison and optimisation

Euclid Collaboration, Sarpa, E., Veropalumbo, A., Bonici, M., Kärcher, M., ..., von Wietersheim-Kramsta, M., ..., & Yeung, H.W. (2026). \textit{Euclid} preparation. Baryon acoustic oscillations extraction techniques: comparison and optimisation. arXiv, arXiv:2605.03446.

Euclid preparation. Refining input galaxy shape distributions for shear calibration simulations

Euclid Collaboration, Jansen, H., Martinet, N., Grandis, S., Hoekstra, H., ..., von Wietersheim-Kramsta, M., ..., & Wright, A.H. (2026). Euclid preparation. Refining input galaxy shape distributions for shear calibration simulations. arXiv, arXiv:2604.26684.

Euclid. Populating a dark universe with galaxies using SciPIC

Euclid Collaboration, Gonzalez, E.J., Carretero, J., Baghkhani, Z., Castander, F.J., ..., von Wietersheim-Kramsta, M., ..., & Yeung, H.W. (2026). Euclid. Populating a dark universe with galaxies using SciPIC. arXiv, arXiv:2604.14802.

KiDS-Legacy: Constraints on Horndeski gravity from weak lensing combined with galaxy clustering and cosmic microwave background anisotropies

Stölzner, B., Reischke, R., Grasso, M., Cataneo, M., Joachimi, B., ..., von Wietersheim-Kramsta, M., ..., & Zhang, Y. (2025). KiDS-Legacy: Constraints on Horndeski gravity from weak lensing combined with galaxy clustering and cosmic microwave background anisotropies. A&A, 707, A323.

KiDS-Legacy: Constraining dark energy, neutrino mass, and curvature

Reischke, R., Stölzner, B., Joachimi, B., Wright, A.H., Asgari, M., ..., von Wietersheim-Kramsta, M., ..., & Zhang, Y. (2025). KiDS-Legacy: Constraining dark energy, neutrino mass, and curvature. A&A, 709, A82.

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., ..., & Von Wietersheim-Kramsta, M. (2025). Matter power spectrum reconstruction with KiDS-Legacy: Improved internal ΛCDM consistency and preference for strong baryonic feedback. A&A, 703, L3.

KiDS-Legacy: Redshift distributions and their calibration

Wright, A.H., Hildebrandt, H., van den Busch, J.L., Bilicki, M., Heymans, C., ..., von Wietersheim-Kramsta, M., ..., & Zhang, Y. (2025). KiDS-Legacy: Redshift distributions and their calibration. A&A, 703, A144.

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., ..., von Wietersheim-Kramsta, M., ..., & Zhang, Y. (2025). KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes. A&A, 702, A169.

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

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

Euclid: I. Overview of the Euclid mission

Euclid Collaboration, Mellier, Y., Abdurro'uf, Acevedo Barroso, J.A., Achúcarro, A., ..., von Wietersheim-Kramsta, M., ..., & Zumalacarregui, M. (2024). Euclid: I. Overview of the Euclid mission. A&A, 697, A1.