Catherine A. Saladrigas^7,8, Benjamin W. Toulson⁷, Andreas Hoffmann⁵, Ben Kamerin⁹, Rebecca Boll⁴, Alberto De Fanis⁴, Patrik Grychtol⁴, Tommaso Mazza⁴, Jacobo Montano⁴, Kiana Setoodehnia⁴, David Lomidze⁴, Robert Hartmann¹⁰, Philipp Schmidt⁴, Anatoli Ulmer³, Alessandro Colombo¹¹, Michael Meyer⁴, Thomas Möller³, Daniela Rupp^5,11,*, Oliver Gessner^7,†, Paul Scheier^2,‡, and Andrey F. Vilesov^1,9,§

• ¹Department of Chemistry, University of Southern California, Los Angeles, California 90089, USA
• ²Department of Physics, Universität Innsbruck, 6020 Innsbruck, Austria
• ³Institut für Optik und Atomare Physik, Technische Universität Berlin, 10623 Berlin, Germany
• ⁴European X-ray Free Electron Laser, 22869 Schenefeld, Germany
• ⁵Max-Born Institut for Nonlinear Optics and Short Pulse Spectroscopy, 12489 Berlin, Germany
• ⁶Department of Physics, Stockholm University, 10691 Stockholm, Sweden
• ⁷Chemical Sciences Division, Lawrence Berkeley National Laboratory. Berkeley, California 94720, USA
• ⁸Department of Chemistry, University of California Berkeley, California 94720, USA
• ⁹Department of Physics and Astronomy, University of Southern California, Los Angeles, California 90089, USA
• ¹⁰PNSensor GmbH, 81739 München, Germany
• ¹¹Laboratory for Solid State Physics, ETH Zurich, 8092 Zurich, Switzerland

• ^*ruppda@phys.ethz.ch
• ^†ogessner@lbl.gov
• ^‡paul.scheier@uibk.ac.at
• ^§vilesov@usc.edu