the spectral curves than Ic. Type Ia supernovae light curves are useful for measuring distances on a cosmological scale. That is, they serve as standard candles. However, due to the similarity of the spectra of Type Ib and Ic supernovae, the latter can form a source of contamination of supernova surveys and must be carefully removed from the observed samples before making distance estimates. See also Type Ia supernova Type II supernova References External links List of all known Type Ib and Ic supernovae at The Open Supernova Catalog. Type 1b and 1c Supernova