Dr. Sandrine PIRES
tel.jpg 01 69 08 92 63
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Engineer-researcher in the CosmoStat Laboratory

Research Interests

Signal and image processing in astrophysics:

Data analysis : multiscale methods, sparse representation, statistical methods
Cosmology : Weak LensingAsteroseismology


I'm involved in the following projects :

- Euclid

- Kepler

- Microscope




Scientific Publications

  1. "Weak Lensig Mass Reconstrcution using Wavelets", J.-L. Starck, S. Pires, and A. Refregier, A&A, 451, 3, 1139-1150, 2006 

  2. "Sunyaev-Zel'dovich clusters reconstruction in multiband bolometer camera surveyl", S. Pires, J.B. Juin, D. Yvon, Y. Moudden, S. Anthoine, and E. Pierpaoli, A&A, 455, 2, 741-755, 2006

  3. "Curvelet applications to asteroseismic data", P. Lambert, S. Pires, J. Ballot, R.A. García and J.L. Starck, A&A, 454, 3, 1021-1027, 2006

  4. "Dark matter maps reveal cosmic scaffolding", R. Massey, J. Rhodes, R. Ellis, N. Scoville, A. Leathaud, A. Finoguenov, P. Capak, D. Bacon, H. Aussel, J.-P. Kneib, A. Koekemoer, H. McCracken, B. Mobasher, S. Pires, A. Réfrégier, S. Sasaki, ,J.-L. Starck, Y. Taniguchi and J. Taylor, Nature, 445, 7125, 286-290, 2007

  5. "Full-sky Weak Lensing Simulation with 70 Billions Particles", R. Teyssier, S. Pires, D. Aubert, C. Pichon, S. Prunet, A. Amara, K. Benabed, S. Colombi, A. Réfrégier and J.-L.Starck, A&A, 497, 2, 335-341, 2009.

  6. "FASTLENS (FAst STatistics for weak Lensing): Fast method for Weak Lensing Statistics and map making", S. Pires, J.-L. Starck, A. Amara, R. Teyssier, A. Réfrégier and J. Fadili, MNRAS, 395, 3, 1265-1279, 2009.

  7. "Handbook for the GREAT08 Challenge: An image analysis competition for cosmological lensing", S. Bridle, J. Shawe-Taylor, A. Amara, D. Applegate, S.-T. Balan, G. Bernstein, J. Berge, H. Dahle, T. Erben, M. Gill, A. Heavens, C. Heymans, W. High, H. Hoekstra, M. Jarvis, T. Kitching, J.-P. Kneib, K. Kuijken, D. Lagattuta, R. Mandelbaum, R. Massey, Y. Mellier, B. Moghaddam, Y. Moudden, R. Nakajima, S. Paulin-Henriksson, S. Pires, A. Rassat, A. Refregier, J. Rhodes, T. Schrabback, E. Semboloni, M. Shmakova, L. van Waerbeke, L. Voigt, D. Wittman, Annals of Applied Statistics, 3, 6-37, 2009.

  8. "On the contribution of large scale structure to strong gravitational lensing", C. Faure, J.-P. Kneib, S. Hilbert, R. Massey, G. Covone, A. Finoguenov, A. Leauthaud, J.E. Taylor, S. Pires, N. Scoville, Anton M. Koekemoe, ApJ, 695, 2, 1233-1243, 2009.

  9. "Cosmological model discrimination from Weak Lensing data", S. Pires, J.-L. Starck, A. Amara, A. Réfrégier and R. Teyssier, A&A, 505, 3, 969-979, 2009.

  10. "Light on Dark Matter with Weak Gravitational Lensing", S. Pires, J.-L. Starck and A. Réfrégier, IEEE Signal Processing Magazine, 27, 1, 76-85, 2010.

  11. "Weak Lensning Mass Reconstruction: Flexion vs Shear", S. Pires and A. Amara, ApJ, 723, 2, 1507-1511, 2010

  12. "Spectral evolution and polarization of variable structures in the pulsar wind nebula of PSR B0540-69.3", N. Lundqvist, P. Lundqvist, C.-I. Björnsson, G. Olofsson, S. Pires, Yu. A. Shibanov and D.A. Zyuzin, MNRAS, 413, 1, 611-627, 2011

  13. "Towards a fast, model-independent Cosmic Microwave Background bispectrum estimator", S. Pires, S. Plaszczynski and A. Lavabre, Statistical Methodology,  9, 71-84, 2012

  14. "Wavelet Helmholtz decomposition for weak lensing mass map reconstruction", E. Deriaz, S. Pires, J.-L. Starck, A&A, 540, A34, 2012

  15. "Cosmological constraints from the capture of non-Gaussianity in Weak Lensing data", S. Pires, A. Leonard, J.-L. Starck, MNRAS, 423, 1, 983-992, 2012.

  16. "Fast Calculation of the Weak Lensing Aperture Mass Statistic", A. Leonard, S. Pires, J.-L. Starck, MNRAS, 423, 4, 3405-3412, 2012.

  17. "Defining a Weak Lensing Experiment in Space", M. Cropper, H. Hoekstra, T. Kitching, J. Amiaux, R. Massey, L. Miller, Y. Mellier, J. Rhodes, B. Rowe, S. Pires, C. Saxton and R. Scaramella, MNRAS, 431, 4, 3103-3126, 2013.

  18. "Origins of weak lensing systematics, and requirements on future instrumentation (or knowledge of instrumentation)", R. Massey, H. Hoekstra, T. Kitching, J. Rhodes, M. Cropper, J. Amiaux, D. Harvey, Y. Mellier, M. Meneghetti, L. Miller,  S. Paulin-Henriksson, S. Pires, R. Scaramella and T. Schrabback, MNRAS, 429, 1, 661-678, 2013.

  19. "Sparsely Sampling the Sky: Regular vs Random Sampling", P. Paykari, S. Pires, J.-L. Starck, A.H. Jaffe, accepted in MNRAS, July 2015

  20. "Gap interpolation by inpainting methods : Application to Ground and Space-based Asteroseismic data", S. Pires, S. Mathur, R.A. Garcia, J. Ballot, D. Stello, K. Sato, A&A, 574, A18, 10, February 2015

  21. "Impact on asteroseismic analyses from regular gaps in Kepler data", R.A. Garcia, S. Mathur, S. Pires, C. Régulo, B. Bellamy, P.L. Pallé, J. Ballot, S. Barcelo Forteza, P.G. Beck, T.R. Bedding, T. Ceillier, T. Roca Cortés, D. Salabert, and D. Stello, A&A, 568, A10, 8, August 2014

  22. "Weak lensing Galaxy Cluster Field Reconstruction", E. Jullo, S. Pires, M. Jauzac, J.-P. Kneib, MNRAS, 437, 4, 3969-3979, February 2014

  23. "A PCA-based automated finder for galaxy-scale strong lenses", R. Joseph, F. Courbin, R.B. Metcalf, C. Giocoli, P. Hartley, N. Jackson, F. Bellagamba, J.-P. Kneib, L. Koopmans, G. Lemson, M. Meneghetti, G. Meylan, M. Petkova, S. Pires, A&A, 566, A63, 10, June 2014

  24. "Dealing with missing data: An inpainting application to the MICROSCOPE space mission", J. Bergé, S. Pires, Q. Baghi, P. Touboul, G. Metris, Physical Review D, 92, 11, December 2015

  25. "High Resolution Weak Lensing Mass-Mapping Combining Shear and Flexion", F. Lanusse, J.-L. Starck, A. Leonard, S. Pires, A&A, 591, A2, 12, June 2016

  26. "A new model to predict weak-lensing peak counts III. Filtering technique comparisons", C. Lin, M. Kilbinger, S. Pires, accepted in A&A, March 2016

  27. "Dealing with missing data in the MICROSCOPE space mission: An adaptation of inpainting to handle colored-noise data", S. Pires, J. Bergé, Q. Baghi, P. Touboul, G. Métris, accepted in Physical Review D, December 2016



PhD manuscript :  "Application des méthodes multi-échelles aux effets de lentille gravitationnelle faibles: reconstruction et analyse des cartes de matière noire", S. Pires, Sedi-Sap/CEA Saclay, defended in December 15, 2008.


Chapter in Book : "Weak Gravitational Lensing", S. Pires, J.-L. Starck, A. Leonard, and A. Refregier, in Advances in Machine Learning and Data Mining for Astronomy, Chapman and Hall, Edtitors M. Way, J. Scargle, K. Ali, A. Srivastava.


Euclid Definition study Report : Mapping the geometry of the dark Universe", Laureijs, R.; Amiaux, J.; Arduini, S.; Auguères, J. -L.; Brinchmann, J.; Cole, R.; Cropper, M.; Dabin, C.; Duvet, L.; Ealet, A.; Garilli, B.; Gondoin, P.; Guzzo, L.; Hoar, J.; Hoekstra, H.; Holmes, R.; Kitching, T.; Maciaszek, T.; Mellier, Y.; Pasian, F.; Percival, W.; Rhodes, J.; Saavedra Criado, G.; Sauvage, M.; Scaramella, R.; Valenziano, L.; Warren, (Report, Euclid Red Book Editorial Team) S.; Bender, R.; Castander, F.; Cimatti, A.; Le Fèvre, O.; Kurki-Suonio, H.; Levi, M.; Lilje, P.; Meylan, G.; Nichol, R.; Pedersen, K.; Popa, V.; Rebolo Lopez, R.; Rix, H. -W.; Rottgering, H.; Zeilinger (Euclid Consortium Board), W.; Grupp, F.; Hudelot, P.; Massey, R.; Meneghetti, M.; Miller, L.; Paltani, S.; Paulin-Henriksson, S.; Pires, S.; Saxton, C.; Schrabback, T.; Seidel, G.; Walsh (Other Euclid Tiger Team members), et al (165 additional authors)




Conference Organization
  • Organizer and speaker at ADA7 summer school (Cargèse, May 7-11, 2012)

  • Workshop « Missing Data in Physics", Nice (France), May 11-12, 2015


- Summer School, "Wavelet And Multifractal Analysis", Institut d'Etude Scientifique de Cargese, Corsica, June 19-31, 2004

- Workshop "Contenu informatif des images numeriques", ENS Cachan (France), November 25-26, 2004 

- Summer School in Statistics for Astronomers & Physicists, Penn State's University (USA), June 5-17, 2005

- Advanced Lectures, "a Pan-Chromatic View of Clusters of Galaxies and the Large-Scale Structure", Instituto Nacional de Astrofísica, Óptica y Electrónica of Puebla (Mexico), June 27- July 8, 2005

- Conference, Les rencontres de Moriond : "Contents and structures of the Universe", La Thuile (Italie), March 18-25, 2006

- Workshop on Nongaussianity in Cosmology, Miramare-Trieste (Italy), July 24-28, 2006 

- Conference, ADA IV (Astronomical Data Analysis), Marseille (France), September 18-20 , 2006

- Colloquium Stellar physics and cosmology, « Dark matter maps reconstruction from weak lensing data - Application to COSMOS data- », Paris (France), May, 24-25, 2007

- Conference, ADA V (Astronomical Data Analysis), Heraklion (Crete), May 7-9 , 2008

- Workshop PPF-PSI on missing data, « Missing data interpolation in Weak Lensing », Toulouse (France), Avril 28, 2009

- Conference Invisible Univers, «Cosmological model discrimination with Weak Lensing » , Paris (France), June 29 - July 3, 2009

- Workshop DEUS (DARK ENERGY UNIVERSE SIMULATIONS), «Cosmological model discrimination with Weak Lensing », December, 4, 2009, IAP, Paris (France)

- Conference, ADA VI (Astronomical Data Analysis), Monastir (Tunisia),  «Cosmological model discrimination from Weak Lensing » , May 3-6 , 2010

- Conference NDIP (New Developments In Photodetection), Lyon (France), « Image processing in Astrophysics », July 4-8, 2011

- Conference, ADA VII (Astronomical Data Analysis), Cargese (France), «Improving Cosmological constraints from non-Gaussianity in Weak Lensing » May 14-18, 2012

- Workshop « Weak Lensing beyond the ordinary", Nice (France), "Optimizing non-Gaussian statistics », June 3-5, 2013

- Workshop « Missing Data in Physics", Nice (France), "Missing Data in asteroseismology", May 11-12, 2015

- Conference MissData, Rennes (France), "Missing Data in asttrophysics", June 18-19, 20125

Invited talks

- « Dark Matter mass map Reconstruction and Analysis using Sparsity, University Observatory », Munich, (Germany), June 17-19, 2008

- « FASTLens Fast method for Weak Lensing Statistics and map making »,  Paris, France , July 9, 2008

- « Application of multiscale methods to Weak Lensing : Reconstruction and Analysis of Dark Matter mass maps », JPL/Caltech, Pasadena (USA), Feb 25-March 16, 2009

- Workshop PPF-PSI on missing data, « Missing data interpolation in Weak Lensing », Toulouse (France), Avril 28, 2009

- Conference NDIP (New Developments In Photodetection), Lyon (France), « Image processing in Astrophysics », July 4-8, 2011

- Mini-workshop on Kepler mission « Signal processing with sparse representations », School of Physics, University of Sydney, Australia, Nov 19-23, 2012

- Conference MissData, Rennes, France, June 18-19, 2015



For more informations refer to : the MRLens Software page


For more informations refer to : the FASTLens Software page


For more informations refer to : the K-Inpainting Software page



Scientific and administrative responsabilities


  • Leader of the Internal data Implementation Work Package in the Euclid OULE3.

  • Leader of the Mass Mapping Work Package in the Euclid Weak Lensing Science Working Group.

  • SDC-FR DEV-OULE3 pipeline Implementation responsible for Euclid

  • SAp Postdoc Responsible (Organization of Postdoc Seminars)

  • Technical and Informatic support to the image processing softwares developed by the team.

















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