- Yan, Renbin;
- Chen, Yanping;
- Lazarz, Daniel;
- Bizyaev, Dmitry;
- Maraston, Claudia;
- Stringfellow, Guy S;
- McCarthy, Kyle;
- Meneses-Goytia, Sofia;
- Law, David R;
- Thomas, Daniel;
- Barroso, Jesus Falcon;
- Sánchez-Gallego, José R;
- Schlafly, Edward;
- Zheng, Zheng;
- Argudo-Fernández, Maria;
- Beaton, Rachael L;
- Beers, Timothy C;
- Bershady, Matthew;
- Blanton, Michael R;
- Brownstein, Joel;
- Bundy, Kevin;
- Chambers, Kenneth C;
- Cherinka, Brian;
- De Lee, Nathan;
- Drory, Niv;
- Galbany, Lluís;
- Holtzman, Jon;
- Imig, Julie;
- Kaiser, Nick;
- Kinemuchi, Karen;
- Liu, Chao;
- Luo, A-Li;
- Magnier, Eugene;
- Majewski, Steven;
- Nair, Preethi;
- Oravetz, Audrey;
- Oravetz, Daniel;
- Pan, Kaike;
- Sobeck, Jennifer;
- Stassun, Keivan;
- Talbot, Michael;
- Tremonti, Christy;
- Waters, Christopher;
- Weijmans, Anne-Marie;
- Wilhelm, Ronald;
- Zasowski, Gail;
- Zhao, Gang;
- Zhao, Yong-Heng
We present the first release of the MaNGA Stellar Library (MaStar), which is a large, well-calibrated, high-quality empirical library covering the wavelength range 3622-10354 Å at a resolving power of R ∼ 1800. The spectra were obtained using the same instrument as used by the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) project, by piggybacking on the Sloan Digital Sky Survey (SDSS-IV)/Apache Point Observatory Galaxy Evolution Experiment 2-N (APOGEE-2N) observations. Compared to previous empirical libraries, the MaStar library will have a higher number of stars and a more comprehensive stellar-parameter coverage, especially of cool dwarfs, low-metallicity stars, and stars with different [α/Fe], achieved by a sophisticated target-selection strategy that takes advantage of stellar-parameter catalogs from the literature. This empirical library will provide a new basis for stellar-population synthesis and is particularly well suited for stellar-population analysis of MaNGA galaxies. The first version of the library contains 8646 high-quality per-visit spectra for 3321 unique stars. Compared to photometry, the relative flux calibration of the library is accurate to 3.9% in g-r, 2.7% in r-i, and 2.2% in i-z. The data are released as part of SDSS Data Release 15. We expect the final release of the library to contain more than 10,000 stars.