Created 08/06/07 by EF
Updated 07/13/16 by EF
The design is a high-throughput fiber-fed echelle. It is cross-dispersed, yielding a passband of 390-910 nm. It accommodates 3 optical fiber pairs (science+sky) and offers 3 resolutions, 60K, 48K and 30K. TRES superseded the Echelle spectrograph at the 1.5m, resulting in much greater observing efficiency (see the links below).
A view of the TRES head from the NE in the chamber. As of April 2014, 7 weights are mounted on each stem, rather than the 5 shown here:
IMPORTANT NOTICE:
Please check with Dave Latham at CfA before the start of each trimester
to coordinate your observations.