Eduardo de la Fuente Acosta (Departamento de Fisica, CUCEI, Universidad de Guadalajara)
The "High Altitude Water Cerenkov (HAWC)" Gamma Ray Observatory

HAWC is currently under construction on the Sierra Negra, Pico de Orizaba National Park, Puebla, Mexico at 19 deg N, 97 deg W, with an elevation of 4100 m above sea level. It is a large water Cherenkov air-shower detector that will consist of 300 large tanks of highly purified water (7.3 m diameter x 4.5 m deep; 200,000 liters), covering an area of ~ 22,000 square meters. Each tank will be instrumented with four hemispherical photomultiplier tubes (three 8 inches and one 10 inches in diameter), to detect particles from extensive air showers produced by gamma rays and cosmic rays. Charged particles traveling through the water of the tanks produce Cherenkov light that will be captured by the photomultiplier tubes. HAWC is a high-duty cycle (> 90 %), large field-of-view (~ 2 sr) instrument capable of monitoring the gamma ray sky at energies up to 100 TeV. HAWC will provide an unbiased survey of the TeV gamma ray sky, measuring spectra of galactic sources up to 100 TeV, and will map galactic diffuse gamma ray emission. With 15 times the sensitivity of its predecessor experiment, Milagro, the HAWC Observatory will enable significant detections of Crab-like fluxes each day at a median energy of 1 TeV. HAWC will also have significant overlap with space- and ground-based detectors, which will also offer synergies between them. The current construction/status of HAWC and its scientific case are presented here.