$\star$ Items zeros for the images of primary education calibration of the CTIO

For the supernovæ discovered with the CTIO, the terms of calibration were determined by the members of our collaboration using standard star observations. We thus used these zero points. The night of March the 28 and 29 2001 gained from several observations of fields of standard. Items zeros remained stable during these two nights. Moreover, zero points measured at the time of these two nights are in agreement with those establish by the personnel of the CTIO . We thus used the images of these two nights as primary education calibrator.