VizieR Online Data Catalog: APOGEE-2 DR17 final allStar catalog (Abdurro'uf+, 2022)

DR17 constitutes the sixth release of data from APOGEE, which has run in two phases (APOGEE-1 and APOGEE-2) spanning both SDSS-III and SDSS-IV. As part of SDSS-III, the APOGEE-1 survey operated for approximately 3yr from 2011 August to 2014 July using the 2.5m Sloan Foundation Telescope at APO. At the start of of SDSS-IV, APOGEE-2 continued its operations in the northern hemisphere by initiating a ~6yr survey (APOGEE-2N). Thanks to unanticipated on-sky efficiency, APOGEE-2N operations concluded in 2020 November with an effective ~7.5yr of bright-time observations, with many programs expanded from their original 6yr baseline. In 2017 April, operations began with the newly built APOGEE-S spectrograph and associated fiber plugplate infrastructure on the 2.5m Irenee du Pont Telescope at LCO; APOGEE-2S observations concluded in 2021 January.

Compared to the previous APOGEE data release (DR16), DR17 contains roughly two additional years of observations in both hemispheres. The final APOGEE survey map is shown in Figures 2 and 3. See Section 4 for further explanations.

DR17 is the final release of data from APOGEE-2 and includes all data from the SDSS-III/APOGEE and SDSS-IV/APOGEE-2 surveys. The observation cutoff date for APOGEE-2N is November 07, 2020 (MJD 59160) and for APOGEE-2S is January 20, 2021 (MJD 59234).

(2 data files).