SCIENCE - The world's first interferometric image at 500 GHz with ALMA Band 8 receivers

ALMA opens another window to the universe in the 500 GHz frequency band. Astronomers successfully synthesized the distribution of atomic carbon around a planetary nebula NGC 6302 in test observations with the ALMA Band 8 receiver, developed by the National Astronomical Observatory of Japan (NAOJ). This is the first 500 GHz band astronomical image captured by a radio interferometer with unprecedentedly high resolution.

http://phys.org/news/2013-09-world-interferometric-image-ghz-alma.htm