Greiner, J., Mazzali, P. A., Kann, D. A., Krühler, T., Pian, E., Prentice, S., Olivares E., F., Rossi, A., Klose, S., Taubenberger, S., Knust, F., Afonso, P. M. J., Ashall, C., Bolmer, J., Delvaux, C., Diehl, R., Elliott, J., Filgas, R., Fynbo, J. P. U., Graham, J. F., Guelbenzu, A. N., Kobayashi, S., Leloudas, G., Savaglio, S., Schady, P., Schmidl, S., Schweyer, T., Sudilovsky, V., Tanga, M. S., Updike, A. C., Van Eerten, H., & Varela, K. (2015). A very luminous magnetar-powered supernova associated with an ultra-long γ-ray burst. Nature, 523(7559), 189-192. doi:10.1038/nature14579.