The Bullseye: HST, Keck/KCWI, and Dragonfly Characterization of a Giant Nine-ringed Galaxy

Imad Pasha, Pieter G. van Dokkum, Qing Liu, William P. Bowman, Steven R. Janssens, Michael A. Keim, Chloe Neufeld, Roberto Abraham. The Astrophysical Journal Letters, Volume 980, Issue 1, id.L3, 16 pp..