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 measuring
redshifts of luminous red galaxies, quasars, emission line galaxies,
and Lyman-alpha QSOs,
in order to create a 3D cosmological map for dark energy research.
It images targets simultaneously using 5000 fibers positioned
with a robotic fiber positioner.
It resides on the Mayall 4m Telescope at Kitt Peak National Observatory (KPNO) and
began its planned five-year survey
in April 2021 after some delay due to the pandemic.
An early release of data was announced in June 2023.
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.
(instrument,cosmology,dark energy,spectrograph,construction)
Further reading:
https://en.wikipedia.org/wiki/Dark_Energy_Spectroscopic_Instrument
http://desi.lbl.gov/
https://arxiv.org/abs/1308.0847
https://lorca.sciencesconf.org/data/program/2018_09_20_spectroDESI_LORCA.pdf
https://ui.adsabs.harvard.edu/abs/2019BAAS...51g..57L/abstract
https://arxiv.org/abs/1611.00036
https://arxiv.org/abs/2306.06308
| WaveL | Freq | Photon
Energy | | |
| .4μm | 750THz | 3.1eV | begin | Dark Energy Spectroscopic Instrument |
| 1μm | 300THz | 1.3eV | end | Dark Energy Spectroscopic Instrument |
|
Referenced by pages:
BigBOSS
fiber positioner
Mayall 4m Telescope
Index