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This paper presents first results obtained by the SPI telescope aboard the INTEGRAL γ-ray observatory. Science highlights comprise the rapid localisation and observation of γ-ray bursts, high-resolution spectroscopy of compact objects, the determination of the morphology and spectral shape of the galactic 511 keV positron annihilation line, and the determination of the spectral shape of the 1809 keV...
I present a newly defined set of spectral indicators for type Ia SNe. I use these indicators to characterize the evolution of these objects with phase and to study the issue of spectral homogeneity from a quantitative point of view. I present an example of a new spectral parameter and its correlation to the secondary lightcurve-shape parameter of the standard candle, Δm 15 (B).
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