Dark Energy Spectroscopic Instrument
(DESI, MS-DESI, MSDESI, Mid-scale Dark Energy Spectroscopic Instrument)
(new instrument for measuring red-shift of distant objects)
The Dark Energy Spectroscopic Instrument (DESI) is a
multi-object spectrograph intended to measure
redshifts of luminous red galaxies, quasars, emission line galaxies,
and Lyman-alpha QSOs,
to create a 3D cosmological map for dark energy research.
It includes 5000 fibers placed automatically using robotics.
It is installed on the Mayall 4m Telescope at Kitt Peak National Observatory (KPNO) and
completed final adjustment and testing Spring 2020
Commencement of its planned five-year survey
was postponed do to the pandemic and as of 1/2021 I don't
know whether it is in progress.
The DESI Legacy Imaging Surveys
are not DESI observations, but are three preliminary surveys to
identify promising targets for DESI. A final data release was
announced in January 2021.
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Referenced by pages:
Mayall 4m Telescope