SN 2008fv: the third type Ia supernova in NGC 3147

TL;DR

This paper studies three type Ia supernovae in NGC 3147, comparing their light curves to understand their homogeneity and differences, highlighting the nearly identical properties of two of them.

Contribution

It presents detailed photometry of SN 2008fv and compares it with earlier SNe Ia in the same galaxy, revealing similarities and differences in their light curves.

Findings

SN 2008fv and SN 1997bq have nearly identical photometric properties.

SN 1972H shows a faster declining light curve.

NGC 3147 hosts three SNe Ia, providing a unique case for studying supernova homogeneity.

Abstract

Multiple outbursts of type Ia SNe in one galaxy present a unique opportunity to study the homogeneity of these objects. NGC 3147 is only the second known galaxy with three SNe Ia, another one is NGC 1316. We present CCD UBVRI photometry for SN Ia 2008fv and compare the light and color curves of this object with those for SNe Ia discovered earlier in NGC 3147: 1972H and 1997bq. The photometric properties of SNe 1997bq and 2008fv are nearly identical, while SN 1972H exhibits faster declining light curve.