Abstract
RESULTS from sounding rocket experiments, confirmed and extended by data from the UHURU satellite, have revealed the existence of cosmic X-ray sources at high galactic latitude which apparently coincide with well known external galaxies. The first of these reported was M87 (ref. 1) followed by NGC-5128 and 3C273 (ref. 2). More recently NGC1275 (refs. 3 and 4) and NGC4151 (ref. 4) have been reported to be X-ray sources. Finally, a source has been reported in the direction of the Coma Cluster which has not yet been associated with a single galaxy (paper presented by H. G., E. M. Kellogg, C. Leong, H. Tananbaum and R. Giacconi at Amer. Phys. Soc. Meeting, March/April 1971). The results from UHURU on these and other subjects are listed in Table 1.
This is a preview of subscription content, access via your institution
Access options
Subscribe to this journal
Receive 51 print issues and online access
$199.00 per year
only $3.90 per issue
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
Byram, E. T., Chubb, T. A., and Friedman, H., Science, 152, 66 (1966).
Bowyer, C. S., Lampton, M., Mack, J., and de Mendonca, F., Astrophys. J. Lett., 161, L1 (1970).
Fritz, G., Davidsen, A., Meekins, J. F., and Friedman, H., Astrophys. J. Lett., 164, L81 (1971).
Gursky, H., Kellogg, E. M., Leong, C., Tananbaum, H., and Giacconi, R., Astrophys. J. Lett., 165, L43 (1971).
Byram, E. T., Chubb, T. A., and Friedman, H., Nature, 229, 544 (1971).
Janes, A. F., Pounds, K. A., Ricketts, M. J., and Rees, M. J., Nature, 230, 188 (1971).
Kellogg, E., Gursky, H., Leong, C., Schreier, E., Tananbaum, H., and Giacconi, R., Astrophys. J. Lett., 165, L49 (1971).
Arp, H., Pub. ASP, 80, 129 (1968).
Burbidge, G., and Burbidge, E., Nature, 224, 21 (1969).
Ryle, M., and Windram, M. D., Mon. Not. Roy. Astron. Soc., 138, 1 (1968).
Willson, M. A. G., Mon. Not. Roy. Astron. Soc., 151, 1 (1970).
Rood, H. J., Pub. ASP, 80, 424 (1968).
Felten, J. I., Gould, R. J., Stein, W. A., and Woolf, N. J., Astrophys. J., 146, 955 (1966).
Ruderman, M. A., and Spiegel, E. A., Astrophys. J., 165, 1 (1971).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
CAVALIERE, A., GURSKY, H. & TUCKER, W. Extragalactic X-ray Sources and Associations of Galaxies. Nature 231, 437–438 (1971). https://doi.org/10.1038/231437a0
Received:
Issue Date:
DOI: https://doi.org/10.1038/231437a0
This article is cited by
-
Cluster richness–mass calibration with cosmic microwave background lensing
Nature Astronomy (2017)
-
Diffuse Baryons in Cosmic Structures
Astrophysics and Space Science (2004)
-
Scaling Properties of X-ray Clusters: The Chandra View
Astrophysics and Space Science (2004)
-
X-ray clusters of galaxies as tracers of structure in the Universe
Nature (2001)
-
Expanding clusters of galaxies as components of a relativistic hierarchical cosmology
Astrophysics and Space Science (1974)
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.