The Sunburst Arc: Direct Lyman α escape observed in the brightest known lensed galaxy T. E. Rivera-Thorsen, H. Dahle, M. Gronke, M. Bayliss, J. R. Rigby, R. Simcoe, R. Bordoloi, M. Turner and G. Furesz A&A, 608 (2017) L4 Published online: 30 November 2017 DOI: 10.1051/0004-6361/201732173