A STUDY OF PROPERTIES OF TYPE IA SUPERNOVA AND THE CALIBRATION OF MULTIBAND PHOTOMETRY

Abstract

The peak luminosity of Type Ia Supernova (SN) can be calibrated using a distance independent luminosity parameter called the decline rate parameter (?m15 (B) to get accurate distances to the galaxies. The photometry gathered from the telescopes should be transformed to a standard scale for uniformity and should be corrected for precision in measurements. The sources of systematic errors are correctly identified and remedied using S-corrections and extinction corrections. The study found a larger scatter in the photometry of Type Ia Supernovae (SNe) in the ultraviolet band (U-band). The importance of Type Ia as a valuable cosmological tool is subsequently shown by deriving the U-band decline rate relation and the magnitude redshift diagram for 36 objects. The photometry of Type Ia SNe puts constraints on the Einstein?s equation of state parameters and supports the Dark Energy cosmological parameter causing the accelerated expansion of the Universe.