TY - JOUR AU - Arganda, E. AU - Arqueros Martínez, Fernando AU - Blanco Ramos, Francisco AU - García Pinto, Diego AU - Monasor, M. AU - Ortiz Ramis, Montserrat AU - Rosado Vélez, Jaime AU - Vázquez Peñas, José Ramón PY - 2010 DO - 10.1103/PhysRevLett.104.091101 SN - 0031-9007 UR - https://hdl.handle.net/20.500.14352/45138 T2 - Physical review letters AB - We describe the measurement of the depth of maximum, X-max, of the longitudinal development of air showers induced by cosmic rays. Almost 4000 events above 10(18) eV observed by the fluorescence detector of the Pierre Auger Observatory in coincidence... LA - eng PB - American Physical Society KW - Cosmic rays KW - Fluorescence light KW - Detector KW - Reconstruction KW - Resolution KW - Spectrum. TI - Measurement of the depth of maximum of extensive air showers above 10(18) eV TY - journal article VL - 104 ER -