Winter School 2005
Asiago (Italy) - February 7-11, 2005
Contributed Lectures
Nancy Elias de la Rosa -
The Reddening Correction
Reddening is an important aspect that it is necessary to bear in mind
when studying the light of a SN. The light can be in fact extinguished
both by the dust in our own Galaxy and within its host galaxy. This
may produce variations in colour at the maximum light which are
correlated with the spread of the peak absolute magnitude, and have
consequently cosmological implications. The ratio of
total-to-selective absorption, Rv, has been well determined in our
Galaxy by comparing the colour of both reddened and unreddened stars
of identical spectral type. With only small dispersion at the shorter
wavelengths, evidence exists that there is remarkable homogeneity of
the optical portion of the interstellar extinction curve along various
line of sight of the Galaxy, if the value Rv=3.1 is assumed. Several
works about SNe Ia show however that the extinction suffered by many
of them is described by extinction laws having not standard Rv. In
this contribution, I will show you different methods to estimated the
reddening of a SN and the different value of Rv found in the
literature.
Stefano Valenti -
Image Template Subtraction
TBD
Maximilian Stritzinger -
The S-Correction
TBD
Sponsored by The Physics of Type Ia Supernovae
- a European Research and Training Network
fpatat@eso.org Last Modified: Fri Jan 28 16:53:57 CET 2005
