In a six-year program started in 2014 July, the Extended Baryon Oscillation Spectroscopic
Survey (eBOSS) will conduct novel cosmological observations using the BOSS …

This paper documents the seventeenth data release (DR17) from the Sloan Digital Sky
Surveys; the fifth and final release from the fourth phase (SDSS-IV). DR17 contains the …

The Sloan Digital Sky Surveys (SDSS) have been almost continuously observing the skies
for over 20 yr, since the project began with a first phase in 1998 (SDSS-I; York et al. 2000) …

The Dark Energy Spectroscopic Instrument (DESI) completed its 5 month Survey Validation
in 2021 May. Spectra of stellar and extragalactic targets from Survey Validation constitute …

We describe the spectroscopic data processing pipeline of the Dark Energy Spectroscopic
Instrument (DESI), which is conducting a redshift survey of about 40 million galaxies and …

Studies of the geometry and energy content of the Universe, physics of cosmic expansion,
fundamental properties of standard model particles, and growth of structure remain the key …

Abstract In 2021 May, the Dark Energy Spectroscopic Instrument (DESI) began a 5 yr survey
of approximately 50 million total extragalactic and Galactic targets. The primary DESI dark …

We present the final Sloan Digital Sky Survey IV (SDSS-IV) quasar catalog from Data
Release 16 of the extended Baryon Oscillation Spectroscopic Survey (eBOSS). This catalog …

We present the Stage II results from the ongoing Satellites Around Galactic Analogs (SAGA)
Survey. Upon completion, the SAGA Survey will spectroscopically identify satellite galaxies …

We present an overview of a new integral field spectroscopic survey called MaNGA
(Mapping Nearby Galaxies at Apache Point Observatory), one of three core programs in the …