The Faculty of Science, Anton Pannekoek Institute for Astronomy (API),  invites applications for a postdoctoral position in X-ray Pulse Profile Modelling.

Pulse Profile Modelling (PPM) is a technique for the analysis of astronomical X-ray data that combines astrophysical modeling, relativistic ray-tracing, and Bayesian inference using high performance computers to deliver the mass and radius of neutron stars and a map of hot emitting regions on the stellar surface. Neutron star mass and radius are key parameters in determining the nature of the supranuclear density matter in the neutron star core.

What are you going to do?

In this role you will contribute to the development of the Pulse Profile Modelling technique, and the implementation of new functionality into our open source X-ray Pulsation Simulation and Inference (X-PSI) software package. You will also be involved in ongoing PPM analysis of real and synthetic X-ray data.

You will work as part of a team with Bachelor/Masters students, PhD students and other postdoctoral researchers, as well as with international collaborators.

What do we require?

You have:

  • a PhD degree in Astrophysics;
  • a track record of research relating to neutron stars (with prior experience in pulse profile modelling or dense matter inference an advantage);
  • experience of coding in Python, Cython and C, high performance computing, and nested sampling techniques;
  • a proven commitment to open source software;
  • the ability to work as part of an online team;
  • good communication skills in oral and written English.

Our offer

A temporary contract for 38  hours per week, preferably starting on 1 June 2021 for the duration of 11 months.  

The salary, depending on relevant experience before the beginning of the employment contract, will be €2,709 to €4,274 (scale 10) gross per month, based on a full-time contract of 38 hours a week. This is exclusive 8% holiday allowance and 8.3% end-of-year bonus. A favourable tax agreement, the ‘30% ruling’, may apply to non-Dutch applicants. The Collective Labour Agreement of Dutch Universities is applicable.

Are you curious about our extensive package of secondary employment benefits like our excellent opportunities for study and development? Then find out more about working at the Faculty of Science.

About the Faculty of Science and the Anton Pannekoek Institute for Astronomy

The Faculty of Science has a student body of around 7,000, as well as 1,600 members of staff working in education, research or support services. Researchers and students at the Faculty of Science are fascinated by every aspect of how the world works, be it elementary particles, the birth of the universe or the functioning of the brain.

The Anton Pannekoek Institute for Astronomy (API) furthers research, teaching and public understanding of astronomy. It conducts astronomical research and trains astronomers from bachelor to postdoctoral level, aiming at world-leading levels and activities.


Do you have questions about this vacancy? Or do you want to know more about our organisation? Please contact:

Job application

The UvA is an equal-opportunity employer. We prioritise diversity and are committed to creating an inclusive environment for everyone. We value a spirit of enquiry and perseverance, provide the space to keep asking questions, and promote a culture of curiosity and creativity.

Do you recognize yourself in the job profile? Then we look forward to receiving your application by 4 February 2021. 

You may apply online by using the link below.

Applications in .pdf should include:

  • a motivation letter and CV, including a list of publications;
  • e-mail addresses for 3 referees who can be contacted for references if shortlisted.

Please mention the months (not just years) in your CV when referring to your education and work experience;

We will invite potential candidates for online interviews in February 2021.

No agencies please

Apply now

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