Abstract
THE strongly variable X-ray source Cen XR-2 was first observed from rocket payloads of the Universities of Adelaide and Tasmania (UAT) in April 1967. This letter reports the results of a reanalysis of UAT flight II on April 20, 1967. It is shown that the particular rocket motion coupled with the unique intensity of Cen XR-2 at the time permits determination of a galactic longitude for the source lII = 310.2±1°, which is relatively insensitive to possible errors in the rocket attitude solution. A comparison with more recent X-ray and optical observations yields a positional conflict suggestive of two separate X-ray phenomena.
This is a preview of subscription content, access via your institution
Access options
References
Grader, R. J., Hill, R. W., Seward, F. D., and Toor, A., Science, 152, 1499 (1966).
Bowyer, C. S., Field, G. B., and Mack, J. E., Nature, 217, 32 (1968).
Harries, J. R., and Francey, R. J., Austral. J. Phys., 21, 715 (1968).
Cooke, B. A., Pounds, K. A., Stewardson, E. A., and Adams, D. J., Astrophys. J. Lett., 150, L189 (1967).
Chodil, G., Mark, H., Rodrigues, R., and Swift, C. D., Astrophys. J. Lett., 152, L45 (1968).
Lewin, W. H. G., Clark, G. W., and Smith, W. B., Nature, 219, 1235 (1968).
Buselli, G., Proc. Astron. Soc. Austral., 1, 168 (1968).
Cooke, B. A., Griffiths, R. E., and Pounds, K. A., Nature, 22A, 134 (1969).
Rao, U. R., Chitris, E. V., and Prakasarao, A. S., Astrophys. J. Lett., 157, L127 (1969).
MacGregor, A., Seward, F., and Turiel, I., Astrophys. J., 161, 979 (1970).
Poveda, A., and Woltjer, L., Astron. J., 73, 65 (1968).
Milne, D. K., Proc. Astron. Soc. Austral, 1, 333 (1970).
Feast, M. W., Nature, 216, 775 (1967). Blanco, V., Kunkel, W., Hiltner, W. A., Chodil, G., Mark, M., Rodrigues, R., Seward, F., and Swift, C. D., Astrophys. J. Lett., 152, L135 (1968).
Eggen, O. J., Freeman, K. C., and Sandage, A., Astrophys. J. Lett., 154, L27 (1968).
Francey, R. J., J. Geophys. Res., 75 (1970).
Evans, W. D., Belian, R. D., and Conner, J. P., Astrophys. J. Lett., 159, L57 (1970).
Mayer, W., Bradt, H. V., and Rappaport, S., Astrophys. J. Lett., 159, L115 (1970).
Hamilton, P. A., and Haynes, R. F., Austral. J. Phys., 21, 895 (1968).
Lewin, W. H. G., McClintock, J. E., and Smith, W. B., Astrophys. J. Lett., 159, L193 (1970).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
FRANCEY, R. Position of Cen XR-2 (April 1967). Nature Physical Science 229, 229–233 (1971). https://doi.org/10.1038/physci229229a0
Received:
Issue date:
DOI: https://doi.org/10.1038/physci229229a0
This article is cited by
-
Possible X-ray counterparts of γ-ray sources
Nature (1978)
-
M.I.T. studies of transient X-ray phenomena
Astrophysics and Space Science (1976)
