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Portal > Offres > Offre UMR7585-MARCAR-010 - Position postdoctorale (H/F) IN2P3 dans les expériences H.E.S.S. et CTA au LPNHE Paris

IN2P3 Postdoctoral Position in the H.E.S.S. and CTA experiments at LPNHE Paris

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Français - Anglais

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General information

Reference : UMR7585-MARCAR-010
Workplace : PARIS 05
Date of publication : Monday, April 20, 2020
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 1 October 2020
Proportion of work : Full time
Remuneration : between 2617 and 3017 € gross monthly
Desired level of education : 5-year university degree
Experience required : Indifferent


The H.E.S.S./CTA team at LPNHE is involved in data analysis of the H.E.S.S. experiment, and notably in the study of the high energy emission from extragalactic sources, such as active galactic nuclei (AGN), and of their variability. The team participates in campaigns of target of opportunity (ToO) observations and in multi-wavelength monitoring duties to trigger such ToO campaigns. The group is also involved in the search for a potential violation of Lorentz invariance by using data from variable AGN, gamma-ray bursts – recently detected at very high energies – and pulsars. These studies are performed by comparing the photon arrival times to search for energy-dependent temporal delays. The group is particularly active on this subject within a working group which brings together the three major ground-based gamma-ray astronomy experiments, H.E.S.S., MAGIC and VERITAS.

Our activities also include the characterization of the H.E.S.S. instrument response, notably to account for the new, upgraded cameras (H.E.S.S. 1U and NamCam). The needed simulations are essential for any subsequent data analysis.

Likewise, the team is involved in the construction of CTA, the future very high energy observatory, with the development of fast acquiring electronic boards (front-end boards, FEB) which equip NectarCAM, one of the two design concepts proposed for the medium-sized telescopes (MST) of CTA. The FEB is responsible for the low level trigger and data acquisition of NectarCAM. A qualification model of NectarCAM has been built, tested in laboratory as well as during an observation campaign in spring 2019. The team is involved in the calibration of NectarCAM and in the preparation of corresponding analysis tools.


The successful candidate will contribute to the group activities related to H.E.S.S. data analysis and analysis preparation for CTA. He or she will get involved in the studies related to the calibration of NectarCAM, to the analysis of data already acquired, and to the characterization of the FEB.

For the analysis part, he or she will get involved in the science topics developed in the group, and could also in parallel develop a subject of his or her choice related to the analysis and interpretation of H.E.S.S. data or to the future possibilities offered with CTA.

He or she could commit as well to the characterization of the H.E.S.S. cameras by studying the simulated instrument response, especially for the camera recently installed on the large CT5 telescope.


The candidate should have a PhD (or equivalent) in high energy astrophysics, obtained no earlier than Fall 2018. Previous experience in gamma-ray astronomy is desirable although not mandatory. A solid experience in C++ and Python programming will be an asset. Some knowledge in data bases would be desirable.

The position is funded by IN2P3 for two years. The starting date is October 1st , 2020 but a later starting date can be considered.

Applications should include a CV with a summary of previous research activities and a statement of interest. Three reference letters should be sent to Jean-Philippe Lenain ( and Julien Bolmont (
For further information, please contact Jean-Philippe Lenain.

Work Context

LPNHE (Laboratoire de Physique Nucléaire et des Hautes Energies, is a laboratory of the IN2P3 (Institut National de Physique Nucléaire et de Physique de Particules), a CNRS institute, and of the universities « Sorbonne Université » and « Université de Paris ». The laboratory is located in Paris (France). It is involved in major particle physics, astroparticle physics and cosmology international collaborations. 130 permanent agents work at LPNHE.

The H.E.S.S./CTA group at LPNHE is currently involved in the simulations and analysis of the H.E.S.S. data, and in the preparation for the future CTA observatory. The group is composed of 2 permanent researchers with a CNRS researcher (J.-P. Lenain) and a “Maître de Conférences” (J. Bolmont), one post-doctoral fellow and two PhD students.

LPNHE is also part of the Île-de-France node (GRIF) of the European Grid Infrastructure (EGI), hosting computing and data storage facilities of intermediate size but contributing significantly to the treatment of simulations for H.E.S.S. and CTA, for instance. Furthermore, membership to the H.E.S.S. collaboration will grant the successful candidate access to the CC-IN2P3 national computing center.

Constraints and risks

Trips are to be planned in France and abroad, notably a 3-week long observation shift on the H.E.S.S. site in Namibia, and possibly a commissioning shift with the first MST of CTA to be deployed at La Palma in the Canary Islands.

Additional Information

The position is funded by IN2P3 for two years. The starting date is October 1st, 2020. An experience of less than two years after the PhD is required.

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