The Fifteenth Data Release of the Sloan Digital Sky Surveys: First Release of MaNGA Derived Quantities, Data Visualization Tools and Stellar Library

Understand

Twenty years have passed since first light for the Sloan Digital Sky Survey (SDSS).

• Here, we release data taken by the fourth phase of SDSS (SDSS-IV) across its first three years of operation (July 2014-July 2017).
• This is the third data release for SDSS-IV, and the fifteenth from SDSS (Data Release Fifteen; DR15).
• New data come from MaNGA - we release 4824 datacubes, as well as the first stellar spectra in the MaNGA Stellar Library (MaStar), the first set of survey-supported analysis products (e.g.