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Portail > Offres > Offre UMR9012-VALPIA-006 - Chercheur (H/F) en Astroparticules Nature et origine des rayons cosmiques aux plus hautes énergies.

Job title (M / F compulsory): Researcher in astroparticle physics Nature and origin of the ultra-high energy cosmic rays

This offer is available in the following languages:
Français - Anglais

Date Limite Candidature : lundi 3 mai 2021

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General information

Reference : UMR9012-VALPIA-006
Workplace : ORSAY
Date of publication : Monday, March 22, 2021
Type of Contract : FTC Scientist
Contract Period : 31 months
Expected date of employment : 1 September 2021
Proportion of work : Full time
Remuneration : Between 2728 and 3881 Euros gross per month depending on experience (will be updated by the HR department if changes occur)
Desired level of education : PhD
Experience required : 1 to 4 years


The successful candidate will join the research group of the IJCLab focused on the study of UHECRs with the Pierre Auger Observatory and of gamma rays with the Cherenkov Telescope Array (CTA). The postdoctoral researcher will work in close collaboration with the research team from the IJCLab, and also with the teams in Universities of Bochum and Wuppertal, in a common project funded by the ANR (France) and DFG (Germany) agencies. The Franco-German joint project is dedicated to multi-messenger analyses aimed at identifying the sources of UHECRs. It consists of a study of bursting astrophysical sources, in particular gamma-ray bursts and flaring AGNs, to predict the UHECR sky as a function of energy and primary mass and to constrain the origin of UHECRs on the basis of the largest datasets acquired to this day. The study of the secondary fluxes of neutrinos and gamma rays will provide a powerful test of the most suitable astrophysical scenario.


Specific objectives of this project at LPSC and IJCLab:
- to develop a framework for analyzing public data from UHECR observatories, combining spectral, composition and arrival-direction observables
- to model the flux of secondary gamma rays from UHECR sources for CTA.
Main activities:
● Development of combined fit algorithms
● Development of data reconstruction algorithms
● Taking responsibilities in the data analysis
● Being an active member of the Auger collaboration


Applicants must have a PhD or equivalent degree in astroparticle physics or related fields.
- Knowledge in non-thermal astrophysical modeling and / or data analysis
- Knowledge of statistical analysis (concepts and tools).
- Proficiency in software tools and modern programming languages commonly associated with high energy physics t (C++, Python, etc)
- Demonstrated ability to carry out collaborative research, ability to work with large teams in an international environment
- Capable of autonomy and initiative to lead a research work
- Excellent English level

Work Context

The “Laboratoire de Physique des 2 Infinis Irène Joliot-Curie” (Laboratory of the Physics of the two infinities Irène Joliot-Curie) or IJCLab, is a joint research unit of CNRS, Université Paris-Saclay and Université de Paris, located on the Orsay campus, gathering around 800 people. The recruited researcher will be member of the high-energy astrophysics research team (five researchers, two PhD student), member of the international collaboration Pierre Auger.
As members of the international Pierre Auger Collaboration, the postdoctoral researcher will also participate in the analysis and interpretation of the data collected with the Pierre Auger Observatory. Research visits to the Observatory in Argentina and to collaborating institutes are planned.
Both IJCLab and LPSC laboratories, partners of the project, are involved in cutting-edge research in the fields of ultra-high-energy cosmic-ray physics, gamma-ray astronomy, cosmology, high-energy physics and nuclear physics. Excellent infrastructure and IT resources are provided. More information can be obtained at https://www.ijclab.in2p3.fr/en and http://lpsc.in2p3.fr/index.php/en/.

Constraints and risks


Additional Information

Applications from researchers with more than two years of postdoctoral work will be favored, but applications with less experience but with an excellent track record will also be carefully considered. The candidate should submit a cover letter, CV and list of publications. Letters of recommendation will be appreciated. Applications should be submitted preferably before April 30, 2021. Subsequent applications may be considered as long as the position remains unfilled. Interviews will be held during the second half of May.
Benefits included: health insurance, maternity/paternity leave, lunch participation, family supplement for children, public transportation participation, retirement contributions.

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