Is Liller 1 a building block of the Galactic bulge? - Evidence from APOGEE

The authors thank Katia Cunha for the guidance on the spectrum synthesis and Henrik Joensson for the useful discussion of errors. SKA gratefully acknowledges funding from UKRI through a Future Leaders Fellowship (grant no. MR/Y034147/1). JGF-T gratefully acknowledges the support provided by ANID Fondecyt Regular no. 1260371. DM acknowledges support from the Center for Astrophysics and Associated Technologies CATA by the ANID BASAL projects ACE210002 and FB210003, and by Fondecyt Project No. 1220724. DMN was partially supported by the University of Iowa's Year 2 P3 Strategic Initiatives Programme through funding received for the project entitled 'High Impact Hiring Initiative (HIHI): A Program to Strategically Recruit and Retain Talented Faculty. This work has made use of the VALD data base, operated at Uppsala University, the Institute of Astronomy RAS in Moscow, and the University of Vienna. Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the Participating Institutions. SDSS-IV acknowledges support and resources from the Center for High Performance Computing at the University of Utah. The SDSS website is www.sdss4.org. SDSS-IV is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration including the Brazilian Participation Group, the Carnegie Institution for Science, Carnegie Mellon University, Center for Astrophysics | Harvard & Smithsonian, the Chilean Participation Group, the French Participation Group, Instituto de Astrofisica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe (IPMU)/University of Tokyo, the Korean Participation Group, Lawrence Berkeley National Laboratory, Leibniz Institut fuer Astrophysik Potsdam (AIP), Max-Planck-Institut fuer Astronomie (MPIA Heidelberg), Max-Planck-Institut fuer Astrophysik (MPA Garching), Max-Planck-Institut fuer 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, and Yale University.