TripleSpec 4.1


This is the home page for the TripleSpec infrared spectrometer on SOAR. The instrument was previously used on the Blanco telescope, under the acronym ARCoIRIS. It is the fourth of a series of similar instruments, and was built under contract to NOAO by Cornell University (Terry Herter, PI) and collaborators. The same team was contracted to perform the internal modifications required to adapt the instrument for operation at SOAR (f/16, vs. f/8 on Blanco).

For the time being, use this link to access technical and performance information for use in writing proposals. We will migrate and/or replace information as commissioning of the instrument proceeds.

TSpec will be mounted on SOAR on the IR Nasmyth platform, replacing the OSIRIS spectrograph on one of the side ports. The instrument is fed by a dichroic, which allows visible light to go to the facility guider. The guider is able to patrol the full field of view, including the spectrograph target. So long as there is a suitable guide star in the field of view, this provides faster guiding than the TSpec slit viewer, and therefore better image correction. The slit viewer will still be usable in fields where there are no visible guide stars.

Commissioning and Science Verification

(Current as of March 6, 2019)

We expect performance on SOAR to be similar to that on the Blanco (hopefully, somewhat better), so we are allowing proposals for the instrument for semester 2019B. Proposers should use the technical information from the CTIO website (linked above). Any time granted in this fashion is considered "shared risk", but we would not be offering it if there were serious doubts about performance.

Installation and initial testing will take place during a mid-March engineering run. We expect this run to provide a list of tasks required to complete commissioning, but we may have an opportunity to perform some science verification during the subsequent engineering run (April), and almost certainly during the June engineering run.

People who are interesting in helping with science verification should contact one of the undersigned; check this page for status in late March. Preference for science verification will be given to proposals that can produce a useful science result with a few hours or less of data. Proposers who have successfully used the instrument on Blanco are particularly welcome.

- Jay Elias & Sean Points