Hectospec Observers Manual

Hectospec Observers Cheat Sheet (1 page list of instructions)

Fiber Assignment Programs 

Observer Responsibilities

Old Operations Manual (contains important figures, but much out of date material on operations)

Draft Hectospec Hardware Reference Manual

General Info

Photo Gallery


Instrument Layout
View of Fiber Positioners

Hectospec Positioner and Spectrograph

Construction of the Hectospec: 300 optical fiber-fed spectrograph for the converted MMT

Targeting and sequencing algorithms for the Hectospec's optical fiber robotic positioner

Hectospec, the MMT's 300 Optical Fiber-Fed Spectrograph

PI: Daniel Fabricant
Project Engineer: Robert Fata

Hectospec is a moderate-resolution, multiobject optical spectrograph fed by 300 optical fibers. The instrument is composed of a robotic positioner and a large, bench-mounted spectrograph, joined by a bundle of 25m long optical fibers.

Dual robots, dubbed Fred and Ginger, reconfigure all 300 optical fibers in just 300 seconds.

The spectrograph offers 5770Å of spectral coverage at ~6Å resolution in the 350 to 1000 nm band. A higher dispersion grating offering ~3Å resolution is also available.

During the April 2004 observing run, ~10,000 spectra of 19th to 21st magnitude galaxies were obtained during 7 nights of partially clear weather. At the end of the run, the typical setup time had dropped to about 20 minutes, measured from the completion of the last exposure of the old field to the beginning of the first exposure on the new field.