Target Selection for the SDSS-IV APOGEE-2 Survey

Authors :: Zasowski, G.
Cohen, R. E.
Chojnowski, S. D.
Santana, F.
Oelkers, R. J.
Andrews, B.
Beaton, R. L.
Bender, C.
Bird, J. C.
Bovy, J.
Carlberg, J. K.
Covey, K.
Cunha, K.
Dell'Agli, F.
Fleming, S. W.
Frinchaboy, P. M.
Garcia-Hernandez, D. A.
Harding, P.
Holtzman, J.
Johnson, J. A.
Kollmeier, J. A.
Majewski, S. R.
Meszaros, Sz.
Munn, J.
Munoz, R. R.
Ness, M. K.
Nidever, D. L.
Poleski, R.
Zuniga, C. Roman
Shetrone, M.
Simon, J. D.
Smith, V. V.
Sobeck, J. S.
Stringfellow, G. S.
Szigetiaros, L.
Tayar, J.
Troup, N.
Publication Year :: 2017
Abstract: APOGEE-2 is a high-resolution, near-infrared spectroscopic survey observing roughly 300,000 stars across the entire sky. It is the successor to APOGEE and is part of the Sloan Digital Sky Survey IV (SDSS-IV). APOGEE-2 is expanding upon APOGEE's goals of addressing critical questions of stellar astrophysics, stellar populations, and Galactic chemodynamical evolution using (1) an enhanced set of target types and (2) a second spectrograph at Las Campanas Observatory in Chile. APOGEE-2 is targeting red giant branch (RGB) and red clump (RC) stars, RR Lyrae, low-mass dwarf stars, young stellar objects, and numerous other Milky Way and Local Group sources across the entire sky from both hemispheres. In this paper, we describe the APOGEE-2 observational design, target selection catalogs and algorithms, and the targeting-related documentation included in the SDSS data releases.<br />Comment: 19 pages, 6 figures. Accepted to AJ