Author:
Hirano T.,Hayakawa S.,Nagase F.,Tawara Y.
Reference6 articles.
1. Cowley, A. P., Crampton, D., and Hutchings, J. B.: 1979, Astrophys. J.
231, 539.
2. Giacconi, R. G., Gorenstein, P., Gursky, H. H., Usher, P., Waters, J., Sandage, A., Osmer, P., and Jugaku, J.: 1967, Astrophys. J.
18, L129.
3. Hayakawa, S., Hirano, T., Kunieda, H., and Nagase, F.: 1984, Adv. Space Res.
3, 67.
4. Hirano, T., Hayakawa, S., Kunieda, H., Makino, F., Masai, K., Nagase, F., and Yamashita, K.: 1984, Publ. Astron. Soc. Japan
36, 769.
5. Pravdo, S. H.: 1983, Astrophys. J.
270, 239.