List of contributions from the CTA Consortium presented at the 34th International Cosmic Ray Conference, 30 July - 6 August 2015, The Hague, The Netherlands.

J-F. Glicenstein∗9, O. Abril6, J-A. Barrio14, O. Blanch Bigas6, J. Bolmont12, F. Bouyjou9, P. Brun13, E. Chabanne10, C. Champion1, S. Colonges1, P. Corona12, E. Delagnes9, C. Delgado2, C. Diaz Ginzo2, D. Durand9, J-P. Ernenwein3, S. Fegan11, O. Ferreira11, M. Fesquet9, A. Fiasson10, G. Fontaine11, N. Fouque10, D. Gascon5, B. Giebels11, F. Henault7, R. Hermel10, D. Hoffmann3, D. Horan11, J. Houles3, P. Jean8, L. Jocou7, S. Karkar12, J. Knödlseder8, R. Kossakowski10, G. Lamanna10, T. Le Flour10, J-P. Lenain12, A. Leveque8, F. Louis9, G. Martinez3, Y. Moudden9, E. Moulin10, P. Nayman12, F. Nunio9, J-F. Olive8, J-L. Panazol10, S. Pavy11, P-O. Petrucci7, E. Pierre12, J. Prast10, M. Punch1, P. Ramon8, S. Rateau11, T. Ravel8, S. Rosier-Lees10, A. Sanuy5, M. Shayduk4,9, P-Y Sizun10, K-H. Sulanke4, J-P. Tavernet12, L-A. Tejedor Alvarez14, F. Toussenel12, G. Vasileiadis13, V.Voisin12, V. Waegebert8, R. Wischnewski4,for the CTA consortium15 1: APC, Univ Paris Diderot, CNRS/IN2P3, CEA/lrfu, Obs de Paris, Sorbonne Paris Cité, France, France, 2: CIEMAT, Spain, 3:Centre de Physique des Particules de Marseille (CPPM), Aix-Marseille Université, CNRS/IN2P3, Marseille, France, 4: Deutsches Elektronen-Synchrotron, Germany, 5: Departament d’Astronomia i Meteorologia, Institut de Ciències del Cosmos, Universitat de Barcelona, Spain, 6: Institut de Física d’Altes Energies, Spain, 7: Institut de Planétologie et d’Astrophysique de Grenoble, INSU/CNRS, Université Joseph Fourier, France, 8: Institut de Recherche en Astrophysique et Planétologie, France, 9: IRFU, CEA-Saclay, Gif-sur-Yvette, France, 10: Laboratoire d’Annecy-le-Vieux de Physique des Particules, Université de Savoie, CNRS/IN2P3, France, 11: Laboratoire Leprince-Ringuet, Ecole Polytechnique (UMR 7638, CNRS), France, 12: LPNHE, University of Pierre et Marie Curie, Paris 6, University of Denis Diderot, Paris 7, CNRS/IN2P3, France, 13: Laboratoire Univers et Particules de Montpellier, Université de Montpellier, CNRS/IN2P3, France, 14: Grupo de Altas Energias, Universidad Complutense de Madrid., Spain, 15: Full consortium author list at http://cta-observatory.org E-mail: glicens@cea.fr

Compilation of CTA contributions to the proceedings of the 33rd International Cosmic Ray Conference (ICRC2013), which took place in 2-9 July, 2013, in Rio de Janeiro, Brazil

The Cherenkov Telescope Array (CTA) is the next generation of Imaging Atmospheric Cherenkov Telescopes. It will reach a sensitivity and an energy resolution with no precendent in very high energy gamma-ray astronomy. In order to achieve this goal, the systematic uncertainties derived from the atmospheric conditions shall be reduced to the minimum. Different instruments may help account for these uncertainties. The Barcelona IFAE/UAB (acronyms for Institut de F\'isica d'Altes Energies and Universitat Aut\`onoma de Barcelona, respectively) and the Montpellier LUPM (Laboratoire Univers et Particules de Montpellier) groups are building Raman LIDARs, devices which can reduce the systematic uncertainties in the reconstruction of the gamma-ray energies from 20$%$ down to 5$%$. The Raman LIDARs subject of this work have coaxial 1.8 m mirrors with a Nd-YAG laser each. A liquid light-guide collects the light at the focal plane and transports it to the readout system. We are developping a monochromator with the purpose of testing the readout chain of both LIDARs. This device is composed of a system of filters and a photomultiplier, and will be used to study a particular elastic channel. After characterizing the system, we will build a polychromator to collect also the sparse Raman signal and will optimize it to reduce every possible loss of signal. We report on the current status of the LIDARs development and also the latest results on the different characterization tests.