Four GRB supernovae at redshifts between 0.4 and 0.8. The bursts GRB 071112C, 111228A, 120714B, and 130831A
Journal
Date Issued
2019
Author(s)
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.
•
•
Takats, K.
•
Tanga, M.
•
Updike, A. C.
•
Varela, K.
Abstract
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.
Volume
622
Issn Identifier
0004-6361
Ads BibCode
2019A&A...622A.138K
Rights
open.access
File(s)![Thumbnail Image]()
![Thumbnail Image]()
Loading...
Name
29300-Klose_4GRBSN_2019_P02.pdf
Description
Miur
Size
6.73 MB
Format
Adobe PDF
Checksum (MD5)
2e4be664df4642e1fc9f359c49b1bbaf
Loading...
Name
29300-Klose_4GRBSN_2019_P01.pdf
Description
Miur
Size
7.32 MB
Format
Adobe PDF
Checksum (MD5)
7573fe89c4681813cad9a5565cb2656e