1. 1. Makino, F. IAU Circ. No. 4447 (1987). 2. Dotani, T. et al Nature 330, 230-232 (1987). 3. McCray, RM Shull, J M. & Sutherland, P. Astrophys. J. 317, L73-L77 (1987). 4. Itoh, H., Hayakawa, S., Masai, K. & Nomoto, K. Publs astr. Soc. Japan 39, 529-537 (1987). 5. Gehrels, N., MacCallum, C. J. & Leventhal, M. Astrophys. J. 320, L19-L22 (1987). 6. Xu, Y., Sutherland, F. & McCray, R. Astrophys. J. (in the press). 7. Ebisuzaki, T. & Shibazaki, N. Astrophys. J. (submitted). 8. Catchpole, R. et al. Mon. Not. R. astr. Soc. (in the press). 9. Hamuy, M., Suntzeff, N. B., Gonzalez, R. & Martin, G. Astr. J. (in the press). 10. Hirata, K. et al. Phys. Rev. Lett. 58, 1490-1493 (1987). 11. Bionta, R. M. et al. Phys. Rev. Lett. 58, 1094-1496 (1987). 12. Nomoto, K., Shigeyama, T., Hayakawa, S., Itoh, H. & Masai, K. in Proc. 4th George Mason Workshop: Supernova 1987A in the LMC (ed. Kafatos, M.) (Cambridge University Press in the press). 13. Shigeyama, T., Nomoto, K., Hashimoto, M. & Sugimoto, D. Nature 328, 320-323 (1987). 14. Nomoto, K., Shigeyama, T. & Hashimoto, M. in Proc. ESO Workshop on SN1987A (ed. Danziger, J.) (ESO, Garching, 1987). 15. Woosley, S. E., Pinto, P. & Ensman, L. Astrophys. J. (in the press). 16. Pomraning, G. C. Astrophys. J. 266, 841-847 (1983). 17. Woosley, S. E. Astrophys. J. (submitted). 18. McMaster, W. H. et al. Compilation of X-ray Cross-sections, Sect. II, Rev. 1 (Livermore, California, 1969). 19. Ebisuzaki, T. & Shibazaki, N. Astrophys. J. (submitted). 20. Masai, K.., Hayakawa, S., Itoh, H. & Nomoto, K. Nature 330, 235-236 (1987). 21. Sunyaev, R. et al. Nature 330, Til-229 (1987). 22. Pinto, P. & Woosley, S. E. Astrophys. J. (submitted).