The Observer’s Guide to the Gamma-Ray Burst Supernova Connection

Figure 5

Peak/near-peak spectra of GRB-SNe. The spectra have been arbitrarily shifted in flux for comparison purposes and to exaggerate their main features, and host emission lines have been manually removed. The spectra of SNe 2012bz, 2013cq, and 2013dx have been Kaiser smoothed [31] in order to suppress noise. Most of the spectra are characterized by broad absorption features, while such features are conspicuously absent in the spectra of SN 2013ez and SN 2011kl.