Philipp Arras


My work focuses on Bayesian imaging algorithms for radio telescopes. We try to squeeze out all information present in radio data sets in order to arrive at the highest resolution possible together with uncertainty quantification. To this end, I develop theoretical models for inference algorithms and implement them in the context of various software projects: NIFTy (a Python library for Bayesian inference of fields), resolve (my radio imaging algorithm), vlbi_resolve (the same thing for dynamic VLBI imaging) and nifty_gridder (a non-uniform FFT specialized for radio interferometry). More specifically, I work on the unification of calibration and imaging, multi-spectral imaging, polarization imaging, data fusion with single dish data and Very Long Baseline Interferometry (VLBI).

My PhD advisors are Rüdiger Westermann (TU Munich) and Torsten Enßlin (LMU, MPA) and I am funded by the Ministry of Education and Research (BMBF) in context of the Verbundprojekt D-MeerKAT project. During my masters at Heidelberg University I focused on String Theory, Quantum Field Theory and pure maths.

Papers and Publications

See also: arXiv, Google Scholar

  • 2021: Dissertation. pdf.
  • 2020: Efficient wide-field radio interferometric response. arXiv, doi.
  • 2020: Towards Bayesian Data Compression. arXiv, doi.
  • 2020: Comparison of classical and Bayesian imaging in radio interferometry. arXiv, doi, pdf (600dpi) zenodo.
  • 2020: The variable shadow of M87*. arXiv.
  • 2019: NIFTy5 (Numerical Information Field Theory v5). ASCL.
  • 2019: Unified Radio Interferometric Calibration and Imaging with Joint Uncertainty Quantification. arXiv, doi.
  • 2018: Radio Imaging With Information Field Theory. arXiv, doi.
  • 2016: Terminal Singularities, Milnor Numbers, and Matter in F-theory. arXiv, doi.
  • 2016: Master thesis. pdf tex.
  • 2014: Bachelor thesis. pdf tex.



Invited Talks

  • Plenary talk, SKA Bursary Conference, Nov 2017, Cape Town, South Africa.
  • Institute colloquium, Max-Planck Institute for Intelligent Systems, Oct 2018, Tübingen, Germany.
  • Institute colloquium, Center for Astrophysics and Space Physics, North-West University, Nov 2018, Potchefstroom, South Africa.
  • Bayesian Imaging and Gridding workshop, May 2019, Cambridge University, UK.
  • Institute colloquium, May 2019, Würzburg, Germany.
  • Seminar "TRR146: Multiscale Simulation Methods for Soft Matter Systems", Jan 2020, Mainz, Germany.
  • ODSL (Origin Data Science Lab) Journal Club, June 2020, Garching, Germany.

Contributed Conference Talks

  • D-MeerKAT Collaboration meeting, Mar 2018, Würzburg, Germany.
  • The Power of Faraday Tomography, May 2018, Miyasaki, Japan.
  • IEEE European Signal Processing Conference, Sep 2018, Rome, Italy.
  • Monitoring the Nonthermal Universe, Sep 2018, Cochem, Germany.
  • LOFAR MKSP Annual Meeting, Sep 2019, Bochum, Germany.
  • Radio2019 Symposium: Recent progress in radio astronomy, Oct 2019, Dortmund, Germany.
  • LOFAR MKSP Annual Meeting, June 2020, remote.
  • D-MeerKAT Collaboration meeting, June 2020, remote.


  • Science with the MPIfR-MT Prototyp Telescope, Apr 2018, Bonn, Germany.
  • Bayesian Imaging meets Radio Reality (organized by Torsten Enßlin and me), Jul 2018, Garching, Germany.
  • Radio Imaging Workshop, Dec 2018, Cape Town, South Africa.
  • Bayesian Imaging meets Radio Reality II (organized by Torsten Enßlin and me), Aug 2019, Garching, Germany (more).
  • NIFTy6 introduction (organized by me) May 2020, video conference (more).
  • Signal reconstruction with Python (contribution), seminar at LMU, September 2020, Garching, Germany.
  • Workshop on state of the art in sampling and clustering (contribution), October 2020, Garching, Germany.



Last modified: 2021-04-26 Mo 15:24