Four GRB supernovae at redshifts between 0.4 and 0.8. The bursts GRB 071112C, 111228A, 120714B, and 130831A

Twenty years ago, GRB 980425/SN 1998bw revealed that long gamma-ray bursts (GRBs) are physically associated with broad-lined type-Ic supernovae (SNe). Since then more than 1000 long GRBs have been localized to high angular precision, but only in ~50 cases has the underlying SN component been identif...

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Detalles Bibliográficos
Autores: Klose, S., Schmidl, S., Kann, D.A., Nicuesa Guelbenzu, A., Schulze, S., Greiner, J., Olivares E., F., Krühler, T., Schady, P., Afonso, P.M.J., Filgas, R., Fynbo, J. P. U., Rau, A., Rossi, A., Takats, K., Tanga, M., Updike, A. C., Varela, K.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/189618
Acceso en línea:http://hdl.handle.net/10261/189618
Access Level:acceso abierto
Palabra clave:Supernovae: individual: SN 2012eb
Gamma-ray burst: individual: GRB 071112C
Gamma-ray burst: individual: GRB 111228A
Gamma-ray burst: individual: GRB 120714B
Gamma-ray burst: individual: GRB 130831A
Supernovae: individual: SN 2013fu
Descripción
Sumario:Twenty years ago, GRB 980425/SN 1998bw revealed that long gamma-ray bursts (GRBs) are physically associated with broad-lined type-Ic supernovae (SNe). Since then more than 1000 long GRBs have been localized to high angular precision, but only in ~50 cases has the underlying SN component been identified. Using the Gamma-Ray Burst Optical Near-Infrared Detector (GROND) multi-channel imager at ESO/La Silla, during the last ten years we have devoted a substantial amount of observing time to reveal and study SN components in long-GRB afterglows. Here we report on four more GRB SNe (associated with GRBs 071112C, 111228A, 120714B, and 130831A) which were discovered and/or followed-up with GROND and whose redshifts lie between z¿=¿0.4 and 0.8. We study their afterglow light curves, follow the associated SN bumps over several weeks, and characterize their host galaxies. Using SN 1998bw as a template, the derived SN explosion parameters are fully consistent with the corresponding properties of the currently known GRB-SN ensemble, with no evidence for an evolution of their properties as a function of redshift. In two cases (GRB 120714B/SN 2012eb at z¿=¿0.398 and GRB 130831A/SN 2013fu at z¿=¿0.479) additional Very Large Telescope (VLT) spectroscopy of the associated SNe revealed a photospheric expansion velocity at maximum light of about 40 000 and 20 000 km s¿1, respectively. For GRB 120714B, which was an intermediate-luminosity burst, we find additional evidence for a black-body component in the light of the optical transient at early times, similar to what has been detected in some GRB SNe at lower redshifts.© ESO 2019.

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