The Carnegie Supernova Project I: photometry data release of low-redshift stripped-envelope supernovae

TL;DR

This paper presents the photometric data release of low-redshift stripped-envelope supernovae from the Carnegie Supernova Project I, including optical and near-infrared observations, enabling future analysis of supernova properties and host-galaxy extinction.

Contribution

It provides a comprehensive dataset of optical and near-infrared photometry for 34 supernovae, with detailed pre-maximum coverage, facilitating studies of supernova characteristics and extinction estimation.

Findings

Data set includes 34 supernovae with optical and near-infrared photometry.

Pre-maximum observations are available for most objects, aiding early-phase analysis.

Future papers will analyze host-galaxy extinction and supernova progenitor properties.

Abstract

The first phase of the Carnegie Supernova Project (CSP-I) was a dedicated supernova follow-up program based at the Las Campanas Observatory that collected science data of young, low-redshift supernovae between 2004 and 2009. Presented in this paper is the CSP-I photometric data release of low-redshift stripped-envelope core-collapse supernovae. The data consist of optical (uBgVri) photometry of 34 objects, with a subset of 26 having near-infrared (YJH) photometry. Twenty objects have optical pre-maximum coverage with a subset of 12 beginning at least five days prior to the epoch of B-band maximum brightness. In the near-infrared, 17 objects have pre-maximum observations with a subset of 14 beginning at least five days prior to the epoch of J-band maximum brightness. Analysis of this photometric data release is presented in companion papers focusing on techniques to estimate host-galaxy extinction (Stritzinger et al., submitted) and the light-curve and progenitor star properties of the sample (Taddia et al., submitted). The analysis of an accompanying visual-wavelength spectroscopy sample of ~150 spectra will be the subject of a future paper.