Welcome to

Jean Coupon's homepage

Jean Coupon

Who I am

I am an astronomer working at the Department of Astronomy of the University of Geneva, Switzerland.

(photo: H. J. McCracken)

Research activities

I am interested in observational Cosmology to study the fluctuations of Dark Matter as function of space and time, as a tool to unveil the nature of the enigmatic components of the Universe. My field of research is focused on the connection between Dark Matter and galaxies, using weak gravitational lensing and galaxy clustering techniques. I gained expertise in various aspects of the data treatment and science analysis of large data sets from wide-field surveys, including photometric redshifts, galaxy clustering and weak lensing.

My research activities include:

Galaxy evolution, galaxy-dark matter relationship:

  • Halo occupation distribution formalism, stellar-to-halo mass relationship.
  • Tools: photometric redshifts, two-point correlation functions. galaxy-galaxy lensing.

Wide-field surveys, dark Universe probes with gravitational lensing:

  • Galaxy cluster mass profiles, cosmological parameter constraints.
  • Tools: magnification bias, cosmic shear.

Publications: all, refereed

I am actively involved (development and science analysis) in the CFHTLenS, HSC-SSP and Euclid projects. I also participate in the VIPERSCOSMOS, FastSound, and XXL projects.


E-Mail: myfirstname.mylastname@unige.ch

Mailing address: Department of Astronomy, University of Geneva

ch. d’Écogia 16, CH-1290 Versoix, Switzerland

Tel: +41 (0) 22 379 21 09 \ Fax: +41 (0) 22 379 21 33


venice is a mask utility program that reads a mask file (DS9 or fits type) and a catalogue of objects...

The bright-star masks for HSC-SSP

The bright-star masks for HSC-SSP

  The bash scripts and Python code to build the masks are available on GitHub. The masks to flag objects...

Thèse de doctorat

  Download the full text here [in french]. Title: High redshift galaxies : measurements and cosmological constraints This thesis focuses...

CFHTLenS Multiband data

Data catalogues (photo-z, lensing and PDFs) from Coupon et al. (2015) can be found here.

Backing up TB’s of data on Mac OS X

The problem I recently had to increase my disk storage capacity and I took this opportunity to completely revise my...

Super W Of Theta (SWOT)

SWOT is a code to compute two-point statistics for very large data sets, based on “divide and conquer” algorithms, mainly,...