1. Institut de Física d’Altes Energies (IFAE), The Barcelona Institute of Science and Technology, E-08193 Bellaterra (Barcelona), Spain
2. Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas (CIEMAT), E-28040, Madrid, Spain
3. Institute of Space Sciences (ICE, CSIC), Campus UAB, Carrer de Can Magrans, s/n, E-08193 Barcelona, Spain
4. Institut d’Estudis Espacials de Catalunya (IEEC), E-08193 Barcelona, Spain
5. Institute for Particle Physics and Astrophysics, ETH Zürich, Wolfgang-Pauli-Str 27, CH-8093 Zürich, Switzerland
6. Instituto de Fisica Teorica UAM/CSIC, Universidad Autonoma de Madrid, E-28049 Madrid, Spain
7. Leiden Observatory, Leiden University, Leiden, NL-2333CA,The Netherlands
8. Institució Catalana de Recerca i Estudis Avançats, E-08010 Barcelona, Spain
9. Institute for Computational Cosmology, Department of Physics, Durham University, South Road, Durham DH1 3LE, UK