UBVRIz Light Curves of 51 Type II Supernovae

TL;DR

This paper compiles and analyzes UBV RIz light curves of 51 Type II supernovae, studying their color evolution and brightness decline, revealing correlations between decline rates, color, and plateau duration.

Contribution

It provides a comprehensive dataset of supernova light curves and investigates their photometric properties and correlations, enhancing understanding of Type II supernovae behavior.

Findings

Decline parameter s is shallower in redder bands.

Strong correlation of s with brightness at maximum in B band.

Plateau duration correlates with the decline parameter s.

Abstract

We present a compilation of UBV RIz light curves of 51 type II supernovae discovered during the course of four different surveys during 1986 to 2003: the Cerro Tololo Supernova Survey, the Calan/Tololo Supernova Program (C&T), the Supernova Optical and Infrared Survey (SOIRS), and the Carnegie Type II Supernova Survey (CATS). The photometry is based on template-subtracted images to eliminate any potential host galaxy light contamination, and calibrated from foreground stars. This work presents these photometric data, studies the color evolution using different bands, and explores the relation between the magnitude at maximum brightness and the brightness decline parameter (s) from maximum light through the end of the recombination phase. This parameter is found to be shallower for redder bands and appears to have the best correlation in the B band. In addition, it also correlates with the plateau duration, being thus shorter (longer) for larger (smaller) s values.