Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20915013r&link_type=abstract
2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #150.13; Bulletin of the American Astronomical Society,
Astronomy and Astrophysics
Astronomy
Scientific paper
There are several gamma-ray burst (GRB) optical afterglow light curves that show evidence of an associated supernova. The light, basically, comes from two sources; the GRB jet and the supernova. Photometry data has been collected for 16 of these GRBs. After subtracting out the light of the GRB jet (and the host galaxy when necessary), the resulting supernova light curve was analyzed. A model curve was fit to the observed data by searching through a grid of parameter values for the best fit. The parameters are kinetic energy, total ejected mass and nickel mass. The kinetic energy values range from about 2 to about 30 foe (1 foe = 10^51 erg). The peak absolute magnitudes range from -17.5 to -20.6. In comparison with a previous study on stripped-envelope supernova, we find that these ranges are very similar to those of hypernovae not associated with GRBs.
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