Testing for redshift evolution of Type Ia supernovae using the strongly lensed PS1-10afx at $z=1.4$

Understand

The light from distant supernovae (SNe) can be magnified through gravitational lensing when a foreground galaxy is located along the line of sight.

• This line-up allows for detailed studies of SNe at high redshift that otherwise would not be possible.
• Spectroscopic observations of lensed high-redshift Type Ia supernovae (SNe Ia) are of particular interest since they can be used to test for evolution of their intrinsic properties.
• The use of SNe Ia for probing the cosmic expansion history has proven to be an extremely powerful method for measuring cosmological parameters.