Author:
Petre R.,Keohane J.,Hwang U.,Allen G.,Gotthelf E.
Reference11 articles.
1. Allen, G.E., et al. 1997 Ap. J. Lett. 487, L97.
2. Becker, R.H., et al., 1980 Ap. J. Lett. 235, L5.
3. Hamilton, A.J.S., Sarazin, C.L., & Szymkowiak, A.E., 1986, Ap. J. 300, 698.
4. Holt, S.S., et al., 1994, Publ. Astron. Soc. Japan
46, L151.
5. Jones, T.W., & Rang, H., 1993, Ap. J. 402, 560.