Figure 2: The colour change of some supernovae in comparison with our excess component.
From: A possible macronova in the late afterglow of the long–short burst GRB 060614
The emission of SN 2006aj, SN 2008ha and SN 2010bh, adopted from the literature25,26,27 has been shifted to z=0.125, the redshift of GRB 060614, with corrections on the time, frequency and extinction. Note that the ‘excess component’ is much redder than them (the upward arrow represents a lower limit).
