artículo
GRB 140606B/iPTF14bfu: detection of shock-breakout emission from a cosmological gamma-ray burst?
Fecha
2015Registro en:
10.1093/mnras/stv1327
1365-2966
0035-8711
WOS:000360851900036
Autor
Cano, Zach
de Ugarte Postigo, A.
Perley, D.
Kruehler, T.
Margutti, R.
Friis, M.
Malesani, D.
Jakobsson, P.
Fynbo, J. P. U.
Gorosabel, J.
Hjorth, J.
Sanchez Ramirez, R.
Schulze, S.
Tanvir, N. R.
Thoene, C. C.
Xu, D.
Institución
Resumen
We present optical and near-infrared photometry of GRB 140606B (z = 0.384), and optical photometry and spectroscopy of its associated supernova (SN). The results of our modelling indicate that the bolometric properties of the SN (M-Ni = 0.4 +/- 0.2 M-circle dot, M-ej = 5 +/- 2 M-circle dot, and E-K = 2 +/- 1 x 10(52) erg) are fully consistent with the statistical averages determined for other gamma-ray burst (GRB)-SNe. However, in terms of its gamma-ray emission, GRB 140606B is an outlier of the Amati relation, and occupies the same region as low luminosity (ll) and short GRBs. The gamma-ray emission in llGRBs is thought to arise in some or all events from a shock breakout (SBO), rather than from a jet. The measured peak photon energy (E-p approximate to 800 keV) is close to that expected for. -rays created by an SBO (greater than or similar to 1 MeV). Moreover, based on its position in the M-V,M- (p)- L-iso,L-gamma plane and the E-K-Gamma eta plane, GRB 140606B has properties similar to both SBO-GRBs and jetted-GRBs. Additionally, we searched for correlations between the isotropic gamma-ray emission and the bolometric properties of a sample of GRB-SNe, finding that no statistically significant correlation is present. The average kinetic energy of the sample is (E) over bar (K) = 2.1 x 10(52) erg. All of the GRB-SNe in our sample, with the exception of SN 2006aj, are within this range, which has implications for the total energy budget available to power both the relativistic and non-relativistic components in a GRB-SN event.