Comment on

• A gamma-ray burst at a redshift of z approximately 8.2.

  Tanvir NR, Fox DB, Levan AJ, Berger E, Wiersema K, Fynbo JP, Cucchiara A, Krühler T, Gehrels N, Bloom JS, Greiner J, Evans PA, Rol E, Olivares F, Hjorth J, Jakobsson P, Farihi J, Willingale R, Starling RL, Cenko SB, Perley D, Maund JR, Duke J, Wijers RA, Adamson AJ, Allan A, Bremer MN, Burrows DN, Castro-Tirado AJ, Cavanagh B, de Ugarte Postigo A, Dopita MA, Fatkhullin TA, Fruchter AS, Foley RJ, Gorosabel J, Kennea J, Kerr T, Klose S, Krimm HA, Komarova VN, Kulkarni SR, Moskvitin AS, Mundell CG, Naylor T, Page K, Penprase BE, Perri M, Podsiadlowski P, Roth K, Rutledge RE, Sakamoto T, Schady P, Schmidt BP, Soderberg AM, Sollerman J, Stephens AW, Stratta G, Ukwatta TN, Watson D, Westra E, Wold T, Wolf C. Tanvir NR, et al. Nature. 2009 Oct 29;461(7268):1254-7. doi: 10.1038/nature08459. Nature. 2009. PMID: 19865165
• GRB 090423 at a redshift of z approximately 8.1.

  Salvaterra R, Valle MD, Campana S, Chincarini G, Covino S, D'Avanzo P, Fernández-Soto A, Guidorzi C, Mannucci F, Margutti R, Thöne CC, Antonelli LA, Barthelmy SD, De Pasquale M, D'Elia V, Fiore F, Fugazza D, Hunt LK, Maiorano E, Marinoni S, Marshall FE, Molinari E, Nousek J, Pian E, Racusin JL, Stella L, Amati L, Andreuzzi G, Cusumano G, Fenimore EE, Ferrero P, Giommi P, Guetta D, Holland ST, Hurley K, Israel GL, Mao J, Markwardt CB, Masetti N, Pagani C, Palazzi E, Palmer DM, Piranomonte S, Tagliaferri G, Testa V. Salvaterra R, et al. Nature. 2009 Oct 29;461(7268):1258-60. doi: 10.1038/nature08445. Nature. 2009. PMID: 19865166