BVRI lightcurves of supernovae SN 2011fe in M101, SN 2012aw in M95, and SN 2012cg in NGC 4424

TL;DR

This paper presents detailed BVRcIc lightcurves for three supernovae, analyzing their brightness, color evolution, and distances, and comparing them with other supernovae to understand their properties.

Contribution

It provides densely sampled lightcurves for SN 2011fe, SN 2012aw, and SN 2012cg, including maximum brightness and decline rates, enhancing supernova observational data.

Findings

SN 2011fe lightcurve covers 342 days with detailed pre- and post-maximum data.

Distances derived from lightcurves are consistent with galaxy distances.

Color evolution and bolometric lightcurves show no significant deviations from typical supernovae.

Abstract

Accurate and densely populated BVRcIc lightcurves of supernovae SN 2011fe in M101, SN 2012aw in M95 and SN 2012cg in NGC 4424 are presented and discussed. The SN 2011fe lightcurve spans a total range of 342 days, from 17 days pre- to 325 days post-maximum. The observations of both SN 2012aw and SN 2012cg were stopped by solar conjunction, when the objects were still bright. The lightcurve for SN 2012aw covers 92 days, that of SN 2012cg spans 44 days. Time and brightness of maxima are measured, and from the lightcurve shapes and decline rates the absolute magnitudes are obtained, and the derived distances are compared to that of the parent galaxies. The color evolution and the bolometric lightcurves are evaluated in comparison with those of other well observed supernovae, showing no significant deviations.