An HST Study of the Supernovae Accompanying GRB 040924 and GRB 041006

Details An HST Study of the Supernovae Accompanying GRB 040924 and GRB 041006 An HST Study of the Supernovae Accompanying GRB 040924 and GRB 041006

2005-04-15

arxiv.org/abs/astro-ph/0504359v2

Astrophys.J.636:391-399,2005

Astronomy and Astrophysics

Astrophysics

ApJ accepted (in press). Revised version. High-resolution figures available at http://www.astro.caltech.edu/~ams/GRB-SNe.html

Scientific paper

10.1086/498009

We present the results from a {\it Hubble Space Telescope/ACS} study of the supernovae associated with gamma-ray bursts 040924 ($z=0.86$) and 041006 ($z=0.71$). We find evidence that both GRBs were associated with a SN 1998bw-like supernova dimmed by $\sim 1.5$ and $\sim 0.3$ magnitudes, respectively, making GRB 040924 the faintest GRB-associated SN ever detected. We study the luminosity dispersion in GRB/XRF-associated SNe and compare to local Type Ibc supernovae from the literature. We find significant overlap between the two samples, suggesting that GRB/XRF-associated SNe are not necessarily more luminous nor produce more $^{56}$Ni than local SNe. Based on the current (limited) datasets, we find that the two samples may share a similar $^{56}$Ni production mechanism.

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