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Post-starburst galaxies are crucial to disentangling the effect of starformation and quenching on galaxy demographics. They comprise, however, aheterogeneous population of objects, described in numerous ways. To obtain awell-defined and uncontaminated sample, we take advantage of spatially resolvedspectroscopy to construct an unambiguous sample of E + A galaxies -post-starburst systems with no observed ongoing star formation. Using data fromthe Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) Survey, in thefourth generation of the Sloan Digital Sky Survey (SDSS-IV), we have identified30 E + A galaxies that lie within the green valley of color-stellar mass space.We first identified E + A candidates by their central, single-fiber spectra and(u-r) color from SDSS DR15, and then further required each galaxy to exhibit E+ A properties throughout the entirety of the system to three effective radii.We describe our selection criteria in detail, note common pitfalls in E + Aidentification, and introduce the basic characteristics of the sample. We willuse this E + A sample, which has been assembled with stringent criteria andthus re-establishes a well-defined subpopulation within the broader category ofpost-starburst galaxies, to study the evolution of galaxies and their stellarpopulations in the time just after star formation within them is fullyquenched.

Refining the E+A Galaxy: A Spatially Resolved Spectrophotometric Sample of Nearby Post-starburst Systems in SDSS-IV MaNGA (MPL-5)