期刊
ASTRONOMICAL JOURNAL
卷 162, 期 6, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/1538-3881/ac260c
关键词
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资金
- NASA - Space Telescope Science Institute [51386.01, NAS 5-26555]
- National Science Foundation (NSF) [AST-1449476]
- NSF [AST-1616636, AST-1909497, AST-1203017, AST-1911129, AST-1715898]
- European Research Council (ERC) under the European Union [670519]
- KU Leuven Research Council [C16/18/005]
- BELgian federal Science Policy Office (BELSPO) through PRODEX grant PLATO
- National Science Foundation REU program [AST-1311835, AST-1715662, PHY-1358770, PHY-1659444]
- Chilean Centro de Excelencia en Astrofisica y Tecnologias Afines (CATA) BASAL [AFB-170002]
- Direccion de Investigacion y Desarrollo de la Universidad de La Serena through the Programa de Incentivo a la Investigacion de Academicos (PIA-DIDULS)
- NSF Astronomy and Astrophysics Postdoctoral Fellowship [AST-1801940]
- State Research Agency (AEI) of the Spanish Ministry of Science, Innovation and Universities (MCIU)
- European Regional Development Fund (FEDER) [AYA2017-88254-P]
- Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT) through the FONDECYT [1170476]
- QUIMAL project [130001]
- CONICYT [AFB-170002]
- Fondecyt Regular [1180350]
- Chilean Centro de Excelencia en Astrofisica y Tecnologias Afines (CATA) [AFB-170002]
- CONACYT [CB2018 A1S-9754]
- UNAM DGAPA , Mexico [PAPIIT IN112620]
- Alfred P. Sloan Foundation
- U.S. Department of Energy Office of Science
- Carnegie Institution for Science
- Chilean Participation Group
- French Participation Group
- Harvard-Smithsonian Center for Astrophysics
- Instituto de Astrofisica de Canarias
- The Johns Hopkins University
- Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo
- Lawrence Berkeley National Laboratory
- Leibniz Institut fur Astrophysik Potsdam (AIP)
- Max-Planck-Institut fur Astronomie (MPIA Heidelberg)
- MaxPlanck-Institut fur Astrophysik (MPA Garching)
- Max-PlanckInstitut fur Extraterrestrische Physik (MPE)
- National Astronomical Observatories of China
- New Mexico State University
- New York University
- University of Notre Dame
- Observatario Nacional/MCTI
- The Ohio State University
- Pennsylvania State University
- Shanghai Astronomical Observatory,
- United Kingdom Participation Group
- Universidad Nacional Autonoma de Mexico
- University of Arizona
- University of Colorado Boulder
- University of Oxford
- University of Portsmouth
- University of Utah
- University of Virginia
- University of Washington
- University of Wisconsin
- Vanderbilt University
- Yale University
- National Aeronautics and Space Administration
- National Science Foundation
- NASA Office of Space Science [NNX13AC07G]
- Max Planck Institute for Astronomy, Heidelberg
- Max Planck Institute for Extraterrestrial Physics, Garching
- Durham University
- University of Edinburgh
- Queen's University Belfast
- Las Cumbres Observatory Global Telescope Network Incorporated
- National Central University of Taiwan
- National Aeronautics and Space Administration through the Planetary Science Division of the NASA Science Mission Directorate [NNX08AR22G]
- National Science Foundation [AST-1238877]
- University of Maryland
- Eotvos Lorand University (ELTE)
- Los Alamos National Laboratory
- Gordon and Betty Moore Foundation
- National Science Foundation AAG program
- Brazilian Participation Group
- Carnegie Mellon University
- NASA
- Near Earth Object-WISE (NEOWISE)
- Association of Universities for Research in Astronomy, Inc., under NASA [NAS5-26555]
- Space Telescope Science Institute
The paper presents updates and additions to the initial targeting strategy for APOGEE-2N, with modifications made through Ancillary Science Programs and Bright Time Extension. These measures allowed changes to the main survey strategy, inclusion of new programs in response to scientific discoveries, and expansions of existing programs for enhanced scientific success.
The Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2) is a dual-hemisphere, near-infrared (NIR), spectroscopic survey with the goal of producing a chemodynamical mapping of the Milky Way. The targeting for APOGEE-2 is complex and has evolved with time. In this paper, we present the updates and additions to the initial targeting strategy for APOGEE-2N presented in Zasowski et al. (2017). These modifications come in two implementation modes: (i) Ancillary Science Programs competitively awarded to Sloan Digital Sky Survey IV PIs through proposal calls in 2015 and 2017 for the pursuit of new scientific avenues outside the main survey, and (ii) an effective 1.5 yr expansion of the survey, known as the Bright Time Extension (BTX), made possible through accrued efficiency gains over the first years of the APOGEE-2N project. For the 23 distinct ancillary programs, we provide descriptions of the scientific aims, target selection, and how to identify these targets within the APOGEE-2 sample. The BTX permitted changes to the main survey strategy, the inclusion of new programs in response to scientific discoveries or to exploit major new data sets not available at the outset of the survey design, and expansions of existing programs to enhance their scientific success and reach. After describing the motivations, implementation, and assessment of these programs, we also leave a summary of lessons learned from nearly a decade of APOGEE-1 and APOGEE-2 survey operations. A companion paper, F. Santana et al. (submitted; AAS29036), provides a complementary presentation of targeting modifications relevant to APOGEE-2 operations in the Southern Hemisphere.
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