IAFE   05512
INSTITUTO DE ASTRONOMIA Y FISICA DEL ESPACIO
Unidad Ejecutora - UE
artículos
Título:
An enigmatic long-lasting γ-ray burst not accompanied by a bright supernova
Autor/es:
DELLA VALLE, M.; CHINCARINI, G.; PANAGIA, N.; TAGLIAFERRI, G.; MALESANI, D.; TESTA, V.; FUGAZZA, D.; CAMPANA, S.; COVINO, S.; MANGANO, V.; ANTONELLI, L. A.; D'AVANZO, P.; HURLEY, K.; MIRABEL, I. F.; PELLIZZA, L. J.; PIRANOMONTE, S.; STELLA, L.
Revista:
NATURE
Editorial:
Nature Publishing Group
Referencias:
Año: 2006 vol. 444 p. 1050 - 1052
ISSN:
0028-0836
Resumen:
Gamma-ray bursts (GRBs) are short, intense flashes of soft γ-rays coming from the distant Universe. Long-duration GRBs (those lasting more than ~2s) are believed to originate from the deaths of massive stars, mainly on the basis of a handful of solid associations between GRBs and supernovae. GRB 060614, one of the closest GRBs discovered, consisted of a 5-s hard spike followed by softer, brighter emission that lasted for ~100s (refs 8, 9). Here we report deep optical observations of GRB 060614 showing no emerging supernova with absolute visual magnitude brighter than MV=-13.7. Any supernova associated with GRB 060614 was therefore at least 100 times fainter, at optical wavelengths, than the other supernovae associated with GRBs. This demonstrates that some long-lasting GRBs can either be associated with a very faint supernova or produced by different phenomena.