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  Final targeting strategy for the Sloan Digital Sky Survey IV Apache Point Observatory Galactic Evolution Experiment 2 North Survey

Beaton, R. L., Oelkers, R. J., Hayes, C. R., Covey, K. R., Chojnowski, S. D., Lee, N. D., et al. (2021). Final targeting strategy for the Sloan Digital Sky Survey IV Apache Point Observatory Galactic Evolution Experiment 2 North Survey. Astronomical Journal, 162(6): 302. doi:10.3847/1538-3881/ac260c.

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Beaton, Rachael L., Author
Oelkers, Ryan J., Author
Hayes, Christian R., Author
Covey, Kevin R., Author
Chojnowski, S. D., Author
Lee, Nathan De, Author
Sobeck, Jennifer S., Author
Majewski, Steven R., Author
Cohen, Roger E., Author
Fernández-Trincado, José, Author
Longa-Peña, Penélope, Author
O’Connell, Julia E., Author
Santana, Felipe A., Author
Stringfellow, Guy S., Author
Zasowski, Gail, Author
Aerts, Conny, Author
Anguiano, Borja, Author
Bender, Chad, Author
Cañas, Caleb I., Author
Cunha, Katia, Author
Donor, John, AuthorFleming, Scott W., AuthorFrinchaboy, Peter M., AuthorFeuillet, Diane, AuthorHarding, Paul, AuthorHasselquist, Sten, AuthorHoltzman, Jon A., AuthorJohnson, Jennifer A., AuthorKollmeier, Juna A., AuthorKounkel, Marina, AuthorMahadevan, Suvrath, AuthorPrice-Whelan, Adrian. M., AuthorRojas-Arriagada, Alvaro, AuthorRomán-Zúñiga, Carlos, AuthorSchlafly, Edward F., AuthorSchultheis, Mathias, AuthorShetrone, Matthew, AuthorSimon, Joshua D., AuthorStassun, Keivan G., AuthorStutz, Amelia M., AuthorTayar, Jamie, AuthorTeske, Johanna, AuthorTkachenko, Andrew, AuthorTroup, Nicholas, AuthorAlbareti, Franco D., AuthorBizyaev, Dmitry, AuthorBovy, Jo, AuthorBurgasser, Adam J., AuthorComparat, Johan1, Author              Downes, Juan José, AuthorGeisler, Doug, AuthorInno, Laura, AuthorManchado, Arturo, AuthorNess, Melissa K., AuthorPinsonneault, Marc H., AuthorPrada, Francisco, AuthorRoman-Lopes, Alexandre, AuthorSimonian, Gregory V. A., AuthorSmith, Verne V., AuthorYan, Renbin, AuthorZamora, Olga, Author more..
Affiliations:
1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

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 Abstract: 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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Language(s): eng - English
 Dates: 2021-12-08
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.3847/1538-3881/ac260c
 Degree: -

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Title: Astronomical Journal
  Other : Astron. J.
Source Genre: Journal
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Publ. Info: Chicago : Published by the University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 162 (6) Sequence Number: 302 Start / End Page: - Identifier: ISSN: 0004-6256
CoNE: https://pure.mpg.de/cone/journals/resource/954922828207