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The Spectrum of Smc X-1

  • B. A. Peterson (a1) and N. V. Vidal (a1)

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The variable X-ray source in the direction of the Small Magellanic Cloud (SMC), SMC X-1 (2U 0115-73) was discovered by Leong et al. (1971). X-ray eclipses with a period of 3.8927 ± 0.0010 days were subsequently reported by Schreier et al. (1972). Identification of the X-ray source with SK 160, star number 160 in the list of Sanduleak (1968), was proposed by Webster et al. (1972) on the basis of the similarity of its spectrum with that of the optical counterpart of Cyg X-1.

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References

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Bessell, M. S., Peterson, B. A., Wickramasinghe, D. T., and Vidal, N. V., Astrophys. J., 187, 355 (1974).
Bopp, B. W., and Van den Bout, P. A., Publ. Astron. Soc. Pac., 84, 68 (1972).
Bopp, B. W., Grupsmith, G., and Van den Bout, P., Astrophys. J. (Lett.), 178, L5 (1972).
Brucato, Robert, and Kristian, Jerome, Astrophys. J. (Lett.), 178, L129 (1973).
Butler, C. J., and Byrne, P. B., Nature Phys. Sci., 243, 136 (1973).
Crampton, David, and Hutchings, J. B., Astrophys. J. (Lett.), 178, L65 (1972).
Eddington, A. S., The Internal Constitution of the Stars, Cambridge University Press, Cambridge (1926).
Feast, M. W., Thackeray, A. D., and Wesselink, A. J., Mon. Not. R. Astron. Soc., 121, 337 (1960).
Leong, C. Kellogg, E., Gursky, H., Tananbaum, H., and Giacconi, R., Astrophys. J. (Lett.), 170, L67 (1971).
Liller, W., IAUC No. 2469 (1972).
Liller, W., Astrophys. J. (Lett.), 184, L37 (1973).
Mook, D., Hiltner, W. A., and Lynds, R., Astrophys. J. (Lett.), 163, L69 (1971).
Osmer, Patrick S., Astrophys. J. (Lett.), 184, L127 (1973).
Osmer, P. S., and Hiltner, W. A., Astrophys. J. (Lett.), 188, L5 (1974).
Petro, L., Feldman, F. and Hiltner, W. A., Astrophys. J. (Lett.), 184, L123 (1973).
Robertson, J. W., Astrophys. J., 177, 473 (1972).
Sanduleak, N., Astron. J., 73, 246 (1968).
Schreier, E., Giacconi, R., Gursky, H., Kellogg, E., and Tananbaum, H., Astrophys. J. (Lett.), 178, L71 (1972).
Smith, Harding E., Margon, Bruce, and Conti, Peter S., Astrophys. J.(Lett.), 179, L125 (1973).
Thackeray, A. D., ‘Survey of Principal Characteristics of the Magellanic Clouds’, in The Magellanic Clouds (Ed. Muller, André B.), Reidel Publishing Co., Dordrecht (1971).
Vidal, N. V., Wickramasinghe, D. T., Peterson, B. A., and Bessell, M. S., Astrophys. J. (Lett), (in press).
Walborn, Nolan R., Astrophys. J. Suppl. Ser., 23, 257 (1971).
Walborn, Nolan R., Astron, J., 77, 312 (1972).
Webster, B. L., Martin, W. L., Feast, M. W., and Andrews, P. J., Nature Phys. Sci, 240, 183 (1972).
Wickramasinghe, D. T., Vidal, N. V., Bessell, M. S. Peterson, B. A., and Perry, M. E., Astrophys. J., 188, 167 (1974).

The Spectrum of Smc X-1

  • B. A. Peterson (a1) and N. V. Vidal (a1)

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