A γ-ray burst at a redshift of z~8.2

Long-duration γ-ray bursts (GRBs) are thought to result from the explosions of certain massive stars, and some are bright enough that they should be observable out to redshifts of z>20 using current technology. Hitherto, the highest redshift measured for any object was z = 6.96, for a Lyman-α emitting galaxy. Here we report that GRB090423 lies at a redshift of z~8.2, implying that massive stars were being produced and dying as GRBs ~630Myr after the Big Bang. The burst also pinpoints the location of its host galaxy.

Fox, D. B. (author)
Levan, A. J. (author)
Berger, E. (author)
Wiersema, K. (author)
Fynbo, J. P. U. (author)
Cucchiara, A. (author)
Krühler, T. (author)
Gehrels, N. (author)
Bloom, J. S. (author)
Greiner, J. (author)
Evans, P. A. (author)
Rol, E. (author)
Olivares, F. (author)
Hjorth, J. (author)
Jakobsson, P. (author)
Farihi, J. (author)
Willingale, R. (author)
Starling, R. L. C. (author)
Cenko, S. B. (author)
Perley, D. (author)
Maund, J. R. (author)
Duke, J. (author)
Wijers, R. A. M. J. (author)
Adamson, A. J. (author)
Allan, A. (author)
Bremer, M. N. (author)
Burrows, D. N. (author)
Castro-Tirado, A. J. (author)
Cavanagh, B. (author)
de Ugarte Postigo, A. (author)
Dopita, M. A. (author)
Fatkhullin, T. A. (author)
Fruchter, A. S. (author)
Foley, R. J. (author)
Gorosabel, J. (author)
Kennea, J. (author)
Kerr, T. (author)
Klose, S. (author)
Krimm, H. A. (author)
Komarova, V. N. (author)
Kulkarni, S. R. (author)
Moskvitin, A. S. (author)
Mundell, C. G. (author)
Naylor, T. (author)
Page, K. (author)
Penprase, B. E. (author)
Perri, M. (author)
Podsiadlowski, P. (author)
Roth, K. (author)
Rutledge, R. E. (author)
Sakamoto, T. (author)
Schady, P. (author)
Schmidt, B. P. (author)
Soderberg, A. M. (author)
Sollerman, J.Stockholms universitet,Institutionen för astronomi(Swepub:su)solle (author)
Stephens, A. W. (author)
Stratta, G. (author)
Ukwatta, T. N. (author)
Watson, D. (author)
Westra, E. (author)
Wold, T. (author)
Wolf, C. (author)
Stockholms universitetInstitutionen för astronomi (creator_code:org_t)

By the author/editor: Tanvir, N. R.; Fox, D. B.; Levan, A. J.; Berger, E.; Wiersema, K.; Fynbo, J. P. U.; show more...; Cucchiara, A.; Krühler, T.; Gehrels, N.; Bloom, J. S.; Greiner, J.; Evans, P. A.; Rol, E.; Olivares, F.; Hjorth, J.; Jakobsson, P.; Farihi, J.; Willingale, R.; Starling, R. L. ...; Cenko, S. B.; Perley, D.; Maund, J. R.; Duke, J.; Wijers, R. A. M. ...; Adamson, A. J.; Allan, A.; Bremer, M. N.; Burrows, D. N.; Castro-Tirado, A ...; Cavanagh, B.; de Ugarte Postig ...; Dopita, M. A.; Fatkhullin, T. A ...; Fruchter, A. S.; Foley, R. J.; Gorosabel, J.; Kennea, J.; Kerr, T.; Klose, S.; Krimm, H. A.; Komarova, V. N.; Kulkarni, S. R.; Moskvitin, A. S.; Mundell, C. G.; Naylor, T.; Page, K.; Penprase, B. E.; Perri, M.; Podsiadlowski, P ...; Roth, K.; Rutledge, R. E.; Sakamoto, T.; Schady, P.; Schmidt, B. P.; Soderberg, A. M.; Sollerman, J.; Stephens, A. W.; Stratta, G.; Ukwatta, T. N.; Watson, D.; Westra, E.; Wold, T.; Wolf, C.; show less...

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