Upcoming (2023A) Instrument Availability and Configuration

The instrument cube on the Cassegrain focus is currently the only point for mounting instruments on LDT.  The instrument cube supports up to 5 instruments at one time; one on the through port, two on the larger side ports (A & C), and two on smaller side ports (B & D).  The simultaneous mounting of instruments supports fast (~5 minutes) changeover between instruments and allows for multiple instruments to be used in a single night (or simultaneously, as in the case of NIHTS & LMI).

Facility Instruments:

Large Monolithic Imager (LMI) – Available Full-Time, Remote Available

DeVeny Optical Spectrograph – Available Full-Time, Remote Available

Near-Infrared High-Throughput Spectrograph (NIHTS) – Available Full-Time, Remote Available

Visitor / PI Instruments:

EXPRES – Available Full-Time, Remote Available; Contact D. Fischer if you want to use it.

POETS – Contact S. Levine.

QWSSI – Available, typically for a few block scheduled runs per semester, depending upon user demand.

RIMAS – Under Development, Scheduled to arrive at LDT in 2023

Other:

IGRINS – Visited LDT three times between 2016 and 2019.  Now in use at Gemini-S.

Future Instruments – Information for proposers of future instrumentation for LDT


Instrument Cube Configuration:

2023A (Current Semester):

For January through June:

  • Through port: LMI
  • A (large port): QWSSI (April), POETS (May), or RIMAS (commissioning TBD)
  • B (small port): EXPRES (consult with D. Fischer)
  • C (large port): DeVeny
  • D (small port): NIHTS

2023B (Next Semester):

For July through December:

  • Through port: LMI
  • A (large port): QWSSI (TBD), POETS (TBD), or RIMAS (commissioning TBD)
  • B (small port): EXPRES (consult with D. Fischer)
  • C (large port): DeVeny
  • D (small port): NIHTS

Past Instrument Cube Configurations


Status Notes

As of 2017 the instrument cube on the Cassegrain focus is the only location for mounting instruments on LDT.  The instrument cube supports up to 5 instruments at one time; one on the through port, two on the larger side ports, and two on smaller side ports.  No two ports are exactly identical (e.g. the allowed instrument volumes are slightly different between the two larger ports). Some instruments will fit on either similar port, while other instruments may be restricted to a single port.  Each side port is fed by its own dedicated fold mirror (or dichroic).  The cube provides two guider/wavefront-sensor cameras that can be positioned around the edges of the field of view.

The speckle imager QWSSI will be available during during 2022B.

RIMAS is expected to arrive in 2023A, and to start on-sky commissioning and check out. It will not be available for general use in 2023B.

EXPRES started commissioning the Front End Module of the spectrograph during 2017Q3, and of the full spectrograph during 2018A, continuing into 18B. EXPRES continued in mixed commissioning and science modes under a shared-risk mode during 2019A and became available for general use in 2020A. Please contact the EXPRES PI (Debra Fischer) for instrument status and information if you are interested in using EXPRES (see details below under EXPRES).

NIHTS (re-)commissioning started in late August 2017 and continued through early 2018.  As of mid-2018A, the instrument has been available for use (see details below under NIHTS).  Minor details are still being cleaned up.  A data reduction pipeline for NIHTS was developed by M. Cushing (U. Toledo), based on the IDL Spextool package.

The top element of the corrector for the straight through port (where LMI is mounted) was replaced in July 2017.

IGRINS will not be available.  This near-IR spectrograph made three 6-month visits to LDT between 2016-2019, and currently is being used on Gemini South.

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