The extremely red, young L dwarf PSO J318.5338-22.8603: A free-floating planetary-mass analog to directly imaged young gas-giant planets

Michael C. Liu, Eugene A. Magnier, Niall R. Deacon, Katelyn N. Allers, Trent J. Dupuy, Michael C. Kotson, Kimberly M. Aller, W. S. Burgett, K. C. Chambers, P. W. Draper, K. W. Hodapp, R. Jedicke, N. Kaiser, R. P. Kudritzki, N. Metcalfe, J. S. Morgan, P. A. Price, J. L. Tonry, R. J. Wainscoat