We thank Stan Woosley for providing us with his unpublished presupernova models. We also like to thank Konstantinos Kifonidis, who provided software (reaction network) and helped with many critical and useful comments during the course of this work. TP was partly supported by grant 2.P03D.004.13 from the Polish Committee for Scientific Research. The major part of the simulations was performed on the RISC cluster of the MPA, and on the SGI Power Challenge at the Interdisciplinary Centre for Computational Modelling in Warsaw.
© European Southern Observatory (ESO) 1999
Online publication: December 22, 1998