Artículos de revistas
Hypernova Signatures in the Late Rebrightening of GRB 050525A
Fecha
2006-05Registro en:
Della Valle, M.; Malesani, D.; Bloom, J. S.; Benetti, S.; Chincarini, G.; et al.; Hypernova Signatures in the Late Rebrightening of GRB 050525A; Iop Publishing; Astrophysical Journal; 642; 2; 5-2006; 103-106
0004-637X
Autor
Della Valle, M.
Malesani, D.
Bloom, J. S.
Benetti, S.
Chincarini, G.
D'Avanzo, P.
Foley, R. J.
Covino, S.
Melandri, A.
Piranomonte, S.
Tagliaferri, G.
Stella, L.
Gilmozzi, R.
Antonelli, L. A.
Campana, S.
Chen, H. W.
Filliatre, P.
Fiore, F.
Fugazza, D.
Gehrels, N.
Hurley, K.
Mirabel Miquele, Igor Felix
Pellizza González, Leonardo Javier
Piro, L.
Prochaska, J. X.
Resumen
We report observations of GRB 050525A, for which a Gemini North spectrum shows its redshift to be z=0.606. This is the third closest long GRB discovered by Swift. We observed its afterglow using the VLT, Gemini, and TNG telescopes to search for an associated supernova. We find that the early-time light curve is described by a broken power law with a break at t~0.3 days after the burst. About 5 days after the burst, a flattening is apparent, followed by a further dimming. Both the magnitude and the shape of the light curve suggest that a supernova was emerging during the late decay of the afterglow. This supernova, named SN 2005nc, had a rise time faster than SN 1998bw and a long-lasting maximum. A spectrum obtained about 20 days (rest frame) after the GRB resembles the spectrum of SN 1998bw obtained close to maximum light.