I am a faculty researcher (ingénieurchercheur) at the SAp which is part of IRFU at CEA Saclay, near Paris/France. At SAp I am a member of the CosmoStat laboratory, and the AIM mixed research unit together with the University ParisDidérot (Paris 7). I am also associated to the IAP. Our institute is part of the new Université ParisSaclay. Download my CV.

Contact Information
CEA Saclay/Irfu/SAp, AIM Orme des Merisiers Bât 709 F91191 GifsurYvette 
Phone: +33 1 69 08 17 53 Fax: +33 1 69 08 65 77 Office: 280 Email: martin.kilbinger (at) cea.fr 
Research Interests
My main research field is cosmology, in particular weak gravitational lensing. Using observational data from large galaxy surveys, I constrain cosmological models and infer information about dark matter and dark energy. To learn more about the topic, have a look at my (technical) review here, or check the video abstract on the companion web page.
Weak cosmological lensing
I am interested in using cosmic shear, the distortion of galaxies by the largescale structure in the Universe, to measure cosmological parameters. From CFHTLenS, we have obtained constraints on dark matter, dark energy and modified gravity parameters, using second and higherorder statistics, tomography, 2D and 3D weak lensing techniques. See those papers for more details. The ESA space mission Euclid is expected to improve those constraints by orders of magnitude.
One particularly interesting weaklensing observable are peak counts. This higherorder statistic is sensitive to the nonGaussian aspects of the largescale structure. Together with ChiehAn Lin, we have developed a new model prediction approach for peak counts. We have compared this model to Nbody simulations, explored its stochastic nature for strategies to constrain cosmological parameters, and looked at different filtering techniques.
Dark matter, galaxies, and galaxy clusters
I am interested in the relation between galaxies and dark matter, and how galaxies form and evolve in darkmatter structures. This relation can be studied by combining weak gravitational lensing and galaxy clustering statistics. This can help us to understand when and in which galaxies residing in darkmatter halos stars are formed efficiently.
We used weak lensing to measure masses of galaxy clusters in XXL and SDSS, being an important step for cosmological analyses using the number of clusters in mass and redshift.
Sampling the likelihood
I have been developing and implementing the sampling method Population MonteCarlo (PMC) which is an efficient and massively parallelizable method to sample from an arbitrary posterior distribution. PMC readily provides an estimate of the Bayesian evidence. Recently, I have looked into the likelihoodfree technique Approximate Bayesian Computation (ABC) and other likelihood estimation methods, together with my PhD student ChiehAn Lin.
Jobs
PhD for 2017, 50% cofunding from CNES (French space agency) already obtained: “The Euclid space mission: Redshift measurements uncertainties and their effect on cosmological constraints using weak gravitational lensing and galaxy clustering“, cosupervised by Yannick Mellier (IAP). Deadline 31/03/2017.
See also the CosmoStat job page.
Collaborations and projects
CFHTLS (CanadaFrance Hawaii Telescope Legacy Survey) is a deep and wide imaging survey of 170 square degrees in five optical bands, observed between 2003 and 2009 with the widefield camera MegaCam on the 3.6m telescope CFHT.  
CFHTLenS (CanadaFrance Hawaii Telescope Lensing Survey) is the weaklensing collaboration using data from the CFHT legacy survey.  
XXL (The ultimate XMM extragalactic survey) is an extragalactic survey of 2 x 25 square degrees, with very deep Xray coverage from XXM. Deep multiwavelength data is available over the XXL fields (e.g. CFHTLS, BCS), and followup observations are underway and planned.  
Euclid is a large upcoming ESA space mission with the goal to map galaxies and dark matter in the Universe, and to constrain the nature of dark energy. I am deputy lead of the weaklensing science working group (WLSWG), and further work in shear and sciencelevel (Level 3) data processing and validation.  
The DarkEnergy Spectroscopic Instrument is a nextgeneration galaxy clustering (BAO, RSD) observatory, with the aim to measure dark energy properties.  
The CanadaFrance Imaging Survey, a 5,000 deg^{2} survey in the Northern hemisphere. Observations are starting in early 2017. See here for more details. 
Software
 Camelus, a model for weaklensing peak counts. The codes comes with statistical analysis tools for cosmological parameter constraints. In particular, it exploits the stochastical nature of the model predictions using Approximate Bayesian Computation (ABC). [Main author is ChiehAn Lin.]
 CosmoPMC, Cosmology sampling with Population Monte Carlo, an adaptive importancesampling method to explore highdimensional posteriors to estimate parameter constraints and the Bayesian evidence. CosmoPMC comes with various cosmology modules such as weak lensing, galaxy clustering, SNIa, BAO distance priors and CMB (via CAMB/WMAP software). The cosmology module is based on nicaea.
The most recent version is 1.2 (December 2012). The user's guide is on the archive (v3).
 athena, a tree code to calculate secondorder correlation functions, including shearshear ("cosmic shear"), shearposition ("galaxygalaxy lensing") and positionposition (spatial angular correlation).
The most recent version is 1.7 (March 2014).
 nicaea: NumerIcal Cosmology And lEnsing cAlculations. It involves basic cosmology functions (distances, growth factor), darkmatter power spectrum and lensing observables (power spectrum, secondorder shear statistics). The nonlinear power spectrum are the Peacock&Dodds (1996) and Smith, Peacock et al (2003) fitting formulae. The code is easy to use and fast enough to be used for MonteCarlo sampling.
The most recent version is 2.5 (October 2014).
 Cprogram to calculate the filter function and E/Bmode shear function described in arXiv:0907.0795.
 Code for reducedshear correction fits as in arXiv:1004.3493.
Lecture Notes and Talks
 [Aug 2016] Euclid summer school in cosmology, Narbonne. Download my weaklensing lecture notes here (51MB).
 [Jan 2010] Review talk Cosmic shear: From ellipticities to cosmological parameters from the DUEL meeting at Ringberg.
 [Aug 2009] Download my lecture notes "Bayesian statistics and model selection" from a lecture I held at Shanghai Normal University on August 3, 2009.
 [Jun 2007] Download the weak lensing lecture I've given at the IPM Cosmology School 2007 in Tehran.
[ Lecture (15MB)  Part 1 (750kB) (WL by the lSS)  Part 2 (6.7MB) (WL & cosmology)  Part3 (8.6MB) (Observing WL) ]
External Links
Class, the Cosmic Linear Anisotropy Solving System, by Julien Lesgourgues et al.
What might happen at The end of the Universe?
NonScience Stuff
Check out my piano music: videos and music scores available