Jeffrey W. Percival

TL;DR: Data Release 13 (DR13) as mentioned in this paper is the first data release from SDSS-IV, which contains new data, reanalysis of existing data sets and, like all SDSs data releases, is inclusive of previously released data.

TL;DR: Data Release 13 (DR13) as discussed by the authors provides the first 1390 spatially resolved integral field unit observations of nearby galaxies from the Apache Point Observatory Galactic Evolution Experiment 2 (APOGEE-2), Mapping Nearby Galaxies at APO (MaNGA), and the Extended Baryon Oscillation Spectroscopic Survey (eBOSS).

TL;DR: The Wisconsin Hα Mapper (WHAM) has surveyed the distribution and kinematics of ionized gas in the Galaxy above declination -30° and provided the first absolutely calibrated, kinematically resolved map of the Hα emission from the warm ionized medium (WIM) within ~±100 km s-1 of the local standard of rest as discussed by the authors.

TL;DR: In this paper, the authors describe the design, manufacture, and performance of bare-fiber integral field units (IFUs) for the SDSS-IV survey Mapping Nearby Galaxies at Apache Point Observatory (MaNGA).

TL;DR: In this paper, the authors designed and built an imaging spectrograph for the Prime Focus Instrument Package of the Southern African Large Telescope (SALT), which is a versatile instrument specializing in very high throughput, low and medium resolution (R=500-12,500) imaging spectroscopy, using volume phase holographic (VPH) gratings and a double etalon Fabry-Perot interferometer, and spectropolarimetry from 320 to 900 nm.