The POLARBEAR experiment on the Huan Tran Telescope achieved first light in Chile on January 10, 2012.
Pictures of the construction phase can be seen at:
The team is currently preparing the experiment for science observations in April, when weather conditions in Chile become suitable.
Top Photo: The Huan Tran Telescope (HTT) at 17,000 feet (51050 m) altitude.
Bottom Photo: Installing the 1284-bolometer focal plane. Hideki Mori (left) and Zigmund Kermish (right)