• Principled Approach to Deblending
    Leiden Observatory (virtual), on 18.02.2021
  • What will ML do (or not) for LSST
    ML Club panel discussion, on 03.02.2021


  • Source Separation & Data Fusion
    Exascale Astronomy AI & Benchmark workshop (virtual), on 08.12.2020
  • SCARLET capabilities
    Roman Space Telescope SIT @ STScI meeting (virtual), on 05.10.2020
  • Deblending with SCARLET
    Virtual HSC Weak Lensing workshop on 15.06.2020
  • Data Fusion for Astronomy & Cosmology
    Astronomy colloquium at University of Washington (remote) on 21.5.2020 (invited)
    Astronomy seminar in Irvine, CA (remote) on 28.04.2020 (invited)
    CCAPP seminar in Columbus, OH (remote) on 07.04.2020 (invited)
  • LSST-Euclid-WFIRST Joint Survey Processing
    WFIRST FSWG meeting in New York City, NY (remote) on 03.03.2020
  • SCARLET v1.0
    DESC Blending WG meeting on 03.02.2020




  • Galaxies, roof tops, and cocktail parties
    ITA cosmology group seminar in Heidelberg, Germany on 19.12.2017 (invited)
    Thunch seminar in Princeton, NJ on 14.12.2017
    HEP Lunch seminar at Argonne National Lab on 19.10.2017 (invited)
    KICP Lunch seminar in Chicago, IL on 17.10.2017
  • A multi-band, multi-resolution deblender for LSST (& others)
    LSST Project & Community workshop in Tucson, AZ on 15.07.2017
  • A multi-band deblender for LSST and WFIRST
    Astronomy in the 2020s: Synergies with WFIRST at STScI in Baltimore, MD on 26.06.2017
  • Visualizing data
    USRP seminar in Princeton, NJ on 20.06.2017
  • Dark Energy Survey - Status, Science, and Algorithmic Advancements
    LSST school & workshop in Lyon, France on 14.06.2017 (invited)
  • Efficient multi-band deblending
    LSST school & workshop in Lyon, France on 13.06.2017 (invited)
  • Gaussian Mixture Models for Astronomy
    Science with HSC meeting in Princeton, NJ on 20.04.2017
  • A Cosmic Census - and the means to do it right
    HEP Division Seminar at Argonne National Lab on 10.05.2017 (invited)
    Astroparticle Seminar at Fermilab on 08.05.2017 (invited)
    Physics Colloquium in Stony Brook, NY on 28.02.2017 (invited)


  • Systematic limitations for weak-lensing in Stage III (and beyond)
    Science with HSC meeting in Princeton, NJ on 20.10.2016
  • Joint pixel-level processing of WFIRST & LSST
    WFIRST-LSST meeting in Pasadena, CA on 13.09.2016
  • Visualizing data
    USRP seminar in Princeton, NJ on 23.06.2016
    Cross-correlation Spectacular in Stony Brook, NY on 25.05.2016 (invited)
  • Weak-lensing calibration of redMaPPer clusters
    DES collaboration meeting at SLAC in Menlo Park, CA on 09.05.2016
  • Photometric (redshift) measurements in LSST
    LSST photo-z workshop in Pittsburgh, PA on 05.04.2016 (invited)
  • WFIRST & LSST joint processing
    WFIRST Preparatory Science meeting in Pasadena, CA on 03.03.2016
  • The ugly truth about cluster lensing
    Science with HSC meeting in Princeton, NJ on 21.01.2016




  • Lensing as it should be
    DES collaboration meeting in Sant Feliu de Guixols, Spain, on 30.09.2013
  • From kpc to Mpc with consistent weak and strong lensing
    CLASH meeting in London, England, on 16.09.2013
  • Can we do lensing with DECam?
    CCAPP post-doc summer seminar series in Columbus, OH, on 23.07.2013
  • The BIGGER picture - Mass & light maps of massive galaxy clusters from early DECam data
    Cluster lensing workshop at STScI in Baltimore, MD on 17.04.2013
    SnowCluster 2013 in Snowbird, UT, on 27.03.2013


  • The BIGGER picture — Lensing with DECam
    DES collaboration meeting in College Station, TX, on 11.12.2012
  • Constraints from HST WL
    CLASH meeting in Bilbao, Spain, on 20.10.2012
  • The power of CLASH
    Astronomy Colloquium of Ohio University in Athens, OH, on 19.09.2012 (invited)
  • Weak-lensing measurements demystified
    Opening talk of the CCAPP post-doc summer seminar series in Columbus, OH, on 12.06.2012
  • DES WL commissioning database
    DES collaboration meeting in Munich, Germany, on 10.05.2012
  • Cosmology with the CLASH clusters
    SnowPAC 2012 in Snowbird, UT, on 20.03.2012


  • From images to shears to cluster masses
    OSU Astronomy Colloquium in Columbus, OH, on 03.11.2011
  • The OSU shear codes for GREAT10
    Final GREAT10 meeting in Pasadena, CA, on 28.09.2011
  • How pixel noise affects weak-lensing measurements
    DES collaboration meeting in Portsmouth, England on 30.06.11
    Royal Observatory in Edinburgh, Scotland, on 06.07.2011 (invited)
  • WFC3/IR PSF and its variations
    CLASH meeting in Baltimore, MD, on 06.05.2011
  • Why large shears matter
    CCAPP Symposium 2011 in Columbus, OH, on 06.04.2011


  • Cluster lensing with DEIMOS
    DUEL workshop in Sorrento, Italy on 28.10.2010 CLASH meeting in Granada, Spain on 21.09.2010
  • Weak lensing with DEIMOS
    “Lensing in Heidelberg” seminar on 07.07.2010
  • The Standard Template Libary & boost
    ITA cosmology group seminar on 10.06.2010 (example codes from the talk)
  • Measuring gravitational lenses
    CCAPP seminar in Columbus, OH, on 15.05.2010 (invited)
  • Scientific Software Engineering
    ITA cosmology group seminar on 15.04.2010 and on 09.11.2006


    ITA cosmology group seminar on 15.10.2009
  • When shapelets fail and when they prevail
    “Application of Light deflection” seminar at ARI on 17.11.2009 Leiden Observatory on 14.09.2009
    GREAT08 final workshop in Ascona, Switzerland on 30.07.2009
  • When shapelets fail - Limitations for shapelet-based weak-lensing measurements
    “Lensing in Heidelberg” seminar on 10.06.2009
    SPP 1177 meeting in Bad Honnef on 21.05.2009 (invited)
  • Kriging the PSF variation
    Applications of Machine Learning in Astronomy on 15.04.2009



2006 and before

  • Shapelet procedures
    ITA cosmology group seminar on 01.06.2006
  • Shapelets and Gravitational Flexion
    ARI lensing seminar on 02.02.2006
  • Discovery of the Cosmic Microwave Background
    ITA cosmology group seminar on 18.11.2004
  • Comparison of shower models for a hadronic calorimeter prototype with Geant4
    Final talk session of the International DESY Summer Student Program on 06.09.2004
  • Neutronensterne und Weisse Zwerge
    Seminar of the Statistical Mechanics lecture on 16.01.2004