Article

Levan, AJ, Tanvir, NR, Starling, RLC, Wiersema, K, Page, KL, Perley, DA, Schulze, S, Wynn, GA, Chornock, R, Hjorth, J, Cenko, SB, Fruchter, AS, O'Brien, PT, Brown, GC, Tunnicliffe, RL, Malesani, D, Jakobsson, P, Watson, D, Berger, E, Bersier, D et al, Cobb, BE, Covino, S, Cucchiara, A, de Ugarte Postigo, A, Fox, DB, Gal-Yam, A, Goldoni, P, Gorosabel, J, Kaper, L, Kruehler, T, Karjalainen, R, Osborne, JP, Pian, E, Sanchez-Ramirez, R, Schmidt, B, Skillen, I, Tagliaferri, G, Thoene, C, Vaduvescu, O, Wijers, RAMJ and Zauderer, BA (2014) A New Population of Ultra-Long Duration Gamma-Ray Bursts. Astrophysical Journal, 781 (1). ISSN 0004-637X