Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES European Physical Journal C 2606 2013 fdi:010061204 ENG European Physical Journal C 1434-6044 ISI:000325778600001 10 10.1140/epjc/s10052-013-2606-4 https://www.documentation.ird.fr/hor/fdi:010061204 https://www.documentation.ird.fr/intranet/publi/2013/11/010061204.pdf 73 Horizon (IRD) Atmospheric neutrinos are produced during cascades initiated by the interaction of primary cosmic rays with air nuclei. In this paper, a measurement of the atmospheric energy spectrum in the energy range 0.1-200 TeV is presented, using data collected by the ANTARES underwater neutrino telescope from 2008 to 2011. Overall, the measured flux is similar to 25 % higher than predicted by the conventional neutrino flux, and compatible with the measurements reported in ice. The flux is compatible with a single power-law dependence with spectral index gamma (meas)=3.58 +/- 0.12. With the present statistics the contribution of prompt neutrinos cannot be established. 030 ; 020 UR082 / UR235 Maroc