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Portail > Offres > Offre UMR5822-FLOJAC-055 - Chercheur CDD dans le domaine des Ondes Gravitationnelles (H/F)

Postdoc on Gravitational Waves. (H/F)

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

Date Limite Candidature : lundi 11 juillet 2022

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General information

Reference : UMR5822-FLOJAC-055
Date of publication : Monday, June 20, 2022
Type of Contract : FTC Scientist
Contract Period : 24 months
Expected date of employment : 15 December 2022
Proportion of work : Full time
Remuneration : between 2,690 and 3,821 euros gross per month depending on experience.
Desired level of education : PhD
Experience required : 1 to 4 years


Characterization of the Virgo detector and study of the quality of its data during the fourth LIGO-Virgo-KAGRA Observing Run (O4); applications for data analysis.


The “DETector CHARacterization” (DetChar) group is responsible for the quality of the data recorded by the Virgo detector. This requires a detailed understanding of the instrument, such as to follow up on the noises which pollutes its data. The results of this work, which is a key part of the processing of the Virgo data, are used to improve the performance of the detector and to optimize the sensitivity of the different analyses to the gravitational-wave (GW) signals. The IP2I Lyon Virgo group is a key player in the Virgo DetChar activities and it contributes as well to the search for GWs generated during the coalescence of compact binary systems.
At IP2I, the postdoctoral fellow will be member of the “ondes gravitationnelles” group and will primarily work with Jérôme Degallaix and Viola Sordini. In addition, he/she will closely collaborate with Nicolas Arnaud (IJCLab, currently seconded to EGO and coordinator of the Virgo DetChar group), in particular to deploy data quality tools before the start of the fourth LIGO-Virgo-KAGRA Observing Run, O4. After the start of O4, the postdoctoral fellow will take part in the follow-up of the performance of these tools, such as in possible improvements. In particular, one would have to classify the data depending on their quality, to study the transient bursts of noise which are found dominant for the analysis, and to test the performance of a machine learning algorithm that aims at discovering these glitches. These activities will take place at the DetChar-instrument interface on the one hand, and at the DetChar-data analysis interface on the other. The goal will be to reinforce the synergies between these different groups. Moreover, exchanges and sharing of skills are planned with the LIGO and KAGRA DetChar groups as the three collaborations work together within the framework of the global LVK network of detectors.


Instrument work and/or data analysis, if possible applied to searches for gravitational waves; signal processing; statistical analysis of data; software skills.

Work Context

At IP2I, the postdoc will be a member of the "gravitational waves" team and will work mainly with Jérôme Degallaix and Viola Sordini. He will work closely with Nicolas Arnaud (IJCLab, currently seconded to EGO and in charge of the DetChar group of Virgo). The work will be conducted within the LIGO-Virgo-KAGRA international collaboration.

Constraints and risks

Depending on the Virgo data taking schedule, the postdoctoral fellow will spend long-duration periods at EGO.

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