The High-Altitude Water Cherenkov Gamma-Ray Observatory

The HAWC Gamma-Ray Observatory

TeV gamma rays are markers of the most extreme environments in the known universe: supernova explosions, active galactic nuclei, and gamma-ray bursts. Gamma rays are thought to be correlated with the acceleration sites of charged cosmic rays, whose origins have been a mystery for nearly 100 years.

HAWC site viewed from the slope of Sierra Negra
X01, the 300th HAWC tank to be deployed at Sierra Negra, is completed on Dec. 15, 2014 (see breaking news).

The High-Altitude Water Cherenkov Observatory, or HAWC, is a facility designed to observe TeV gamma rays and cosmic rays with an instantaneous aperture that covers more than 15% of the sky. With this large field of view, the detector will be exposed to two-thirds of the sky during a 24-hour period.

HAWC is currently under construction on the flanks of the Sierra Negra volcano near Puebla, Mexico. Located at an altitude of 4100 meters, HAWC will be used to perform a high-sensitivity synoptic survey of the sky at wavelengths between 100 GeV and 100 TeV.

Latest News

Water Filtration and Delivery Completed for Final Tank

January 15, 2015

Today the last empty tanks at HAWC were filled with purified water, completing the process of construction, bladder deployment, water delivery, and purification.

Water plant
The water filtration plant in the HAWC Utility Building at Sierra Negra.

The total weight of water moved, filtered, and delivered for the tanks is 55 kilotons, corresponding to a volume of 55 million liters. This volume is equivalent to one can of soda for every man, woman, and child in Mexico. The weight is equivalent to 110 fully loaded 747 jumbo jets.