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Article Talk. Among the six proposed European documents, one does not seem to correspond to the year of the supernova the chronicle of Jacobus Malvecius. However, also in that case, there is still some tension between observations and theoretical models due to the unknown explosion date and the lack of sufficiently early data to search for the luminous shock-breakout predicted by PISN models Kozyreva et al. The observed spectra show a considerable excess at shorter wavelengths that is not expected from the model spectra. The integrated optical depth accounts for the total opacity, which includes contributions from continuum opacity photoionisation, free-free absorption, and electron scattering processes assuming local thermodynamical equilibrium in the plasma and line interactions. Graham USA. Owing to the limitations of the SYNOW approach, for instance, the simplifying underlying assumptions such as spherical, homologous expansion, resonant scattering line formation above a sharp blackbody spectrum-emitting photosphere, we perform this modelling only for the identification and verification of the major features.

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