Abstract
Evidence has been published recently for variability in both the intensity and spectrum of X-rays from the massive elliptical galaxy M87. This article reports a new spectral measurement obtained in a rocket flight on November 20, 1970, and re-examines the evidence for variability over the period 1965–70.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
We are sorry, but there is no personal subscription option available for your country.
Buy this article
- Purchase on Springer Link
- Instant access to full article PDF
Prices may be subject to local taxes which are calculated during checkout
Similar content being viewed by others
References
Adams, D. J., Cooke, B. A., Evans, K., and Pounds, K. A., Nature, 222, 757 (1969).
Byram, E. T., Chubb, T. A., and Friedman, H., Nature, 229, 544 (1971).
Byram, E. T., Chubb, T. A., and Friedman, H., Science, 152, 66 (1966).
Friedman, H., and Byram, E. T., Science, 158, 257 (1967).
Bradt, H., Mayer, W., Naranan, S., Rappaport, S., and Spada, G., Astrophys. J. Lett., 150, L199 (1967).
Bowyer, C. S., Lampton, M., and Mack, J., Astrophys. J. Lett., 161, L1 (1970).
Cooke, B. A., and Pounds, K. A., Nature, 229, 421 (1971).
Haymes, R. C., Ellis, D. V., Fishman, G. J., Glen, S. W., and Kurfess, J. D., Astrophys. J. Lett., 151, L131 (1968).
Fishman, G. J., Harnden, F. R., and Haymes, R. C., Non-Solar X- and γ-ray Astronomy (edit. by Gratton, L.), 116 (D. Reidel Pub. Co., 1970).
Overbeck, J. W., and Tananbaum, H. D., Astrophys. J. Lett., 153, 899 (1968).
McLintock, J. E., Lewin, W. H. G., Sullivan, R. J., and Clark, G. W., Nature, 223, 162 (1969).
Burbidge, G. R., Astrophys. J. Lett., 159, L105 (1970).
Felten, J. E., Arp, H. C., and Lynds, C. R., Astrophys. J. Lett., 159, 415 (1970).
Graham, I., Mon. Not. Roy. Astron. Soc., 149, 319 (1970).
Miley, G. K., Hogg, D. E., and Basart, J., Astrophys. J. Lett., 159, L19 (1970).
de Vaucouleurs, G., Angione, K., and Fraser, C. W., Astrophys. Lett., 2, 141 (1968).
Cohen, M. H., Moffet, A. T., Shaffer, D., Clark, B. G., Killermann, K. I., Jauncey, D. L., and Gulkis, S., Astrophys. J. Lett., 158, L83 (1969).
Kleinmann, D. E., and Low, F. J., Astrophys. J. Lett., 159, L165 (1970).
Kellermann, K. I., and Pauliny-Toth, I. I. K., Ann. Rev. Astron. Astrophys., 6, 419 (1968).
Wolfe, A. M., and Burbidge, G. R., Astrophys. J. Lett., 161, 419 (1970).
Lynden-Bell, D., Nature, 223, 690 (1969).
Lynden-Bell, D., and Rees, M. J., Mon. Not. Roy. Astron. Soc. (in the press).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
JANES, A., POUNDS, K., RICKETTS, M. et al. Variability in the X-ray Flux from M87. Nature Physical Science 230, 188–191 (1971). https://doi.org/10.1038/physci230188a0
Received:
Issue Date:
DOI: https://doi.org/10.1038/physci230188a0
This article is cited by
-
The diffuse cosmic X-ray background spectrum in the 2–10 keV energy range
Astrophysics and Space Science (1973)
-
Cosmic X-ray spectra
Space Science Reviews (1972)