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The first phase of the Carnegie Supernova Project (CSP-I) was a dedicatedsupernova follow-up program based at the Las Campanas Observatory thatcollected science data of young, low-redshift supernovae between 2004 and 2009.Presented in this paper is the CSP-I photometric data release of low-redshiftstripped-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 asubset of 12 beginning at least five days prior to the epoch of B-band maximumbrightness. In the near-infrared, 17 objects have pre-maximum observations witha subset of 14 beginning at least five days prior to the epoch of J-bandmaximum brightness. Analysis of this photometric data release is presented incompanion papers focusing on techniques to estimate host-galaxy extinction(Stritzinger et al., submitted) and the light-curve and progenitor starproperties of the sample (Taddia et al., submitted). The analysis of anaccompanying visual-wavelength spectroscopy sample of ~150 spectra will be thesubject of a future paper.

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