The ARC 3.5-meter telescope

This telescope is not actually part of the Sloan Survey. The construction of this 3.5-meter telescope was the first project taken on by the Astrophysical Research Consortium. It is a multi-purpose telescope designed specifically to support remote observing by astronomers on the Internet. Unlike most reflector telescopes with two mirrors, the 3.5-meter has an additional flat tertiary mirror that reflects light to the observing instruments. This design allows observers to rapidly switch among as many as nine different instruments.