VizieR Online Data Catalog: SEGUE-2 updated stellar parameter pipeline (Rockosi+, 2022)

The Sloan Extension for Galactic Understanding and Exploration 2 (SEGUE-2) survey used the 2.5m Sloan Foundation Telescope and the two original Sloan Digital Sky Survey fiber spectrographs, as did SEGUE-1 and the SDSS. SEGUE-2 observed for the first year of SDSS-III, from 2008 August through 2009 July. The survey obtained 128,288 spectra of 118,184 unique stars on 211 plates, 204 of which were unique and 7 repeated.

In addition to the new observations, SEGUE-2 updated the SEGUE Stellar Parameter Pipeline (SSPP) to improve the estimates of the stellar parameters [Fe/H], Teff, and logg for all stellar spectra obtained with the original SDSS spectrographs. The updates to the SSPP, the new temperature scale, and the calibration of this scale are described in Section 5 (for Table 5, see Section 5.4.1. and for Table 6, see Section 5.4.2.).

As an additional external evaluation, we compare the SSPP values to those measured by the APOGEE survey (Majewski+ 2017AJ....154...94M) using the subset of SDSS/SEGUE stars observed by both surveys as of Data Release 14 (Abolfathi+ 2018ApJS..235...42A). See Section 6.

(3 data files).