Image Details
Caption: Fig. 14.
Template spectroscopic sequence in the ﹩V﹩‐band at maximum light. The template is derived from 41 library spectra of 28 SNe Ia with a wide range of stretch factors. The pattern is prescribed by the principal component analysis of the narrowband color measurements of the library spectra.
© 2007. The American Astronomical Society. All rights reserved. Printed in U.S.A.