Emergent with dustlane

http://www.legacysurvey.org/viewer?ra=19.3185&dec=0.5023&zoom=15&layer=decals-dr5
Post-emergent object with acquired dustlane has 2 redshifts .089258 1237663784742748248 [.090072] and the companion .089328 1237663784742748246 in family with starburst cltgs .089783 1237663784742813887 and starforming 1237663784742813994 NE

What do you mean by “post-emergent”?