horizontal air showers produced by tau neutrinos interacting in the nearby mountain. HAWC funding HAWC construction and operation is funded jointly by the U.S. National Science Foundation, the U.S. Department of Energy Office of High-Energy Physics, and Consejo Nacional de Ciencia y Tecnología (CONACyT) in Mexico and the Laboratory Directed Research and Development (LDRD) program of Los Alamos National Laboratory. Other significant sources of funding are: Red de Física de Altas Energías, México DGAPA-UNAM, México, grants IN105211, IN112910, IN121309, IN115409 and IA102715 VIEP-BUAP, México, grant 161-EXC-2011 University of Wisconsin Alumni Research Foundation, USA The Institute of Geophysics, Planetary Physics, and Signatures (IGPPS) at Los Alamos National Laboratory (LANL), USA The University of Maryland, USA Results In 2017, HAWC announced the first measurement of the cosmic-ray spectrum and new results on the observed positron excess of antimatter. See also Cherenkov radiation Milagro (experiment) VERITAS References External links Cosmic-ray experiments Cosmic-ray telescopes Gamma-ray telescopes Astronomical observatories in Mexico