Diffusion PNCG – n° 218 – 21 juillet 2021

1. Appel d’offres PNCG 2022


3. IAP colloquium “Debating the potential of machine learning for astronomical surveys” (October, 18-22, online/IAP, Paris)

4. Postdoctoral positions at APC (Paris)

5. Postdoctoral position at IFCA (Spain) 

Envoyez svp vos propositions d’annonces à l’adresse : pncg@iap.fr
Pour vous inscrire ou gérer votre abonnement à la liste PNCG: https://listes.services.cnrs.fr/wws/info/pncg 

1. Appel d’offres PNCG 2022

L’INSU a annoncé dans sa newsletter l’ouverture de l’appel d’offres 2022.

Tous les personnels permanents peuvent répondre à l’appel d’offres du PNCG pour obtenir les fonds nécessaires en particulier pour financer des projets favorisant le développement et la fédération de la communauté française en galaxies et cosmologie. 

Vous pourrez trouvez les informations et les documents nécessaires sur le site du PNCG:

Tout projet doit être soumis via la plateforme électronique SIGAP: sigap.cnrs.fr.
Sur ce site, vous pourrez télécharger le texte complet de l’AO et y retrouver aussi la lettre de cadrage du PNCG. 

Soyez attentif à la limite de page stricte que PNCG applique.

La date limite de soumission des propositions est fixée au 15 septembre 2020 à 17h00.Ne pas oublier que vos demandent doivent aussi être entrées dans la demande DIALOG de votre unité.
transmis par le bureau du PNCG


Le CNES a ouvert les appels pour les propositions de R&T des systèmes orbitaux pour 2022. 

Les propositions d’idées devront être soumises sur le site https://rt-theses.cnes.fr/ impérativement avant le 13 Septembre 2021 à 23H59. Nous vous rappelons que pour accéder au site vous devez au préalable vous identifier ou créer un compte.

Le site de soumission permet aux proposants de modifier les fiches déposées jusqu’à la fermeture du site. Nous attirons votre attention sur le fait que seules les fiches complètes lors de la fermeture seront prises en compte.

Vous trouverez ci-joint le document de cadrage technique. Merci de noter que comme l’année dernière, et afin d’optimiser le processus de gestion des idées, les propositions suivantes doivent être impérativement déposées par vos interlocuteurs techniques du CNES :

  • Les suites d’actions R&T des plans précédents,
  • Les actions issues d’une analyse conjointe menée avec le CNES”

L’appel à propositions de sujets de thèses 2022 sera ouvert du 6 septembre au 8 octobre 2021.

3. IAP colloquium “Debating the potential of machine learning for astronomical surveys” (October, 18-22, online/IAP, Paris)

Abstract submission deadline: 31 August 2021
The 2021 IAP colloquium is dedicated to a critical look at the utility of machine learning techniques for astronomical surveys.

A major revolution is now underway in astrophysics with the constant arrival of ever-richer and more complex datasets. To address the most pressing questions facing astrophysics, the next generation of surveys will generate orders of magnitude more data than before. Unfortunately, the limitations of current analysis techniques to exploit these data are becoming increasingly apparent. There is now widespread hope that deployment of “machine learning” techniques pioneered by the computer industry can provide a way to extract the maximum amount of science from these new surveys, and these new methods are being enthusiastically adopted by astronomers. However the precision, reproducibility and explicability requirements of the computer industry are not the same as that of the astronomical community.

It is therefore very timely to survey the landscape of machine-learning techniques in astronomy and to evaluate their efficacy in solving astrophysical problems. The conference will explore the potential and applicability of machine learning techniques for current and future surveys such as DESI, SKA, Euclid, Rubin Observatory, Ariel and Gaia. In particular the impact of systematic errors on the reliability of inferred parameters (cosmological or otherwise) derived using these methods will be explored. The ability of machine-learning models to lead to scientific discoveries will be critically discussed.

Each morning will feature review talks by recognised experts in the field including:

  • Michelle Lochner
  • Gilles Louppe
  • Francisco Villaescusa-Navarro
  • Ingo Waldmann
  • Benjamin D. Wandelt
  • Elisabeth Krause (TBC)

The conference will be remote with in-person attendance possible for a limited number of people. In order to make the conference as interactive as possible in a hybrid setting we will broadly follow the successful example set by the Machine Learning debate series and end each day with a debate addressing questions selected by the Science Organising Committee, such as:

  • What can machine learning not do … yet?
  • What would it take for the community to accept the results of machine-learning-powered research?
  • Can machine learning models be considered on the same footing as physical models?
  • How do we understand what the machine has understood?
  • What flavours of machine learning techniques are most appropriate for astronomy?

These debates will be led by experts with a wide range of views which will certainly lead to lively discussions: 

  • Anastase Charantonis
  • Tom Charnock
  • Torsten Ensslin
  • Chiara Ferrari
  • Rémi Flamary
  • Alan Heavens
  • Marc Huertas-Company
  • Shirley Ho
  • David Hogg
  • Bhuvnesh Jain
  • Jens Jasche
  • Francois Lanusse
  • Brice Menard
  • Hiraniya Peiris
  • Laurence Perreault Levasseur
  • Alexandre Refregier
  • Romain Teyssier

Looking forward to your participation ! 

More information can be found at the conference website:https://ml-iap2021.sciencesconf.org/.

transmis par H. McCracken

4. Postdoctoral positions at APC (Paris)

Application deadlines: August 31st and on September 20th, or until the positions are filled

The Astroparticle and Cosmology (APC; http://apc.u-paris.fr/) laboratory of the University of Paris seeks applications for three postdoctoral or engineer positions in the area of dark energy research, with specific emphasis on participation in the European Space Agency’s (ESA) Euclid Mission and the Rubin Observatory Legacy Survey of Space and Time (LSST). Understanding the nature of dark energy, responsible for the observed accelerated expansion of the universe, is arguably the most challenging question facing Physics and cosmology today. Planned for launch in 2023, the Euclid mission will survey the extragalactic sky from the Earth-Sun Lagrange point 2 with the aim of constraining the evolution of dark energy using weak gravitational lensing, galaxy clustering, galaxy cluster evolution and cross-correlations with the cosmic microwave background (CMB). Rubin will begin operations in 2023, applying the same set of observational probes across the Southern sky over the course of its ten-year survey.

The cosmology group at APC is actively engaged in a number of forefront experimental efforts, including teams working on the Euclid mission, the Rubin LSST survey and the next generation CMB experiments (Simons Observatory, LiteBird space mission, CMB-S4). The cosmology group benefits from the dynamic scientific context at APC that hosts research groups dedicated to theory, neutrino physics, high-energy astrophysics and gravitational waves, including the Virgo consortium and the LISA space mission. The laboratory is situated on the campus of the University of Paris (https://u-paris.fr/en/) bordering the Seine.

The Euclid and Rubin groups at APC are involved in both the science analysis of the surveys and in the development of the Euclid science ground segment. We are particularly active in galaxy cluster science, cross-correlation with the CMB and weak gravitational lensing, and we are developing novel techniques applying machine learning and artificial intelligence in these areas. There is a strong synergy between the Euclid, Rubin and CMB efforts. We seek candidates eager to work with us in the area of dark energy studies with the aim of contributing in particular to the Euclid mission and the synergy between Euclid and Rubin. Experience with scientific computing, statistics and data analysis in the context of cosmology and astrophysics is recommended.

One postdoctoral fellow will primarily focus on CMB/galaxy cross-correlation methodology for constraining cosmology with galaxy clusters and large-scale structure, in collaboration with James Bartlett and working with the Simons Observatory and CMB-S4 experiments.

In the context of LSST and/or Euclid, in collaboration with Simona Mei, the second post-doctoral fellow will develop Deep Machine Learning networks to estimate photometric redshifts and integrate them to the APC cosmology team’s networks for treating blended galaxies in weak lensing studies, or for clusters and proto-cluster studies at z>1.5 (depending on the postdoctoral fellow’s scientific expertise).

The third postdoctoral or engineer position will focus on the APC responsibilities of processing and validating LSST simulations, and developing software for the LSST and/or the Euclid pipelines (possibilities include the estimation of the galaxy mass function in galaxy clusters, PSF reconstruction in stacked images, photometric redshift estimation) in collaboration with Simona Mei.

While both LSST and Euclid are still in preparation, we will apply our algorithms to simulations and the recently acquired observations from the UNIONS/CFIS survey (https://www.cosmostat.org/projects/unions-cfis).

Depending on funding, the fellowships will be offered for 1.5, 2 and 1+2 years with a nominal start date between November 1st and December 31st 2021. Given the short term of the appointments, we expect the postdoctoral fellows to work 100% on these projects.

Candidates should send their application with the following elements to James Bartlett (bartlett@apc.univ-paris7.fr) and Simona Mei (mei@apc.in2p3.fr):

  • CV
  • Letter of motivation
  • Statement of research interests: past research and planned research, competences and responsibilities. – Have three recommendation letters sent directly to the same addresses above

Application deadline: If interested, we encourage you to apply as soon as possible. We will review applications on August 31st and on September 20th, or until the positions are filled.

Included Benefits: French national medical/dental insurance, maternity/paternity leave, lunch subsidies, family supplement for children, contribution to offset public transportation costs, pension contributions. School is free in France for all children above 3.

Inquiries should be sent to: James Bartlett (bartlett@apc.univ-paris7.fr) and Simona Mei (mei@apc.in2p3.fr)

Transmis par J. Bartlett

5. Postdoctoral position at IFCA (Spain)
Deadline: 30th July.

The Observational Cosmology and Instrumentation Group at the Instituto de Física de Cantabria (CSIC – UC) is seeking for candidates that would be interested in applying for the “María Zambrano” recently created postdoctoral programme.

This programme is associated to Spanish Universities, and IFCA is one of the researches Institutes that could host postdocs from the positions assigned to the Universidad de Cantabria.

The “María Zambrano” positions consist is a 2 year contract for postdoctoral researchers with more than 2 years of experience. Deadline is 30th July. There are 8 positions at the Universidad de Cantabria

Full information details about this position can be found here:

Notice that, unfortunately, information is only in Spanish. Do not hesitate to contact us if you need further clarifications.
transmis par P. Vielva

Envoyez svp vos propositions d’annonces à l’adresse : pncg@iap.fr
Pour gérer votre abonnement à la liste PNCG: https://listes.services.cnrs.fr/wws/info/pncg