Abstract
The intensity of the diffuse component of cosmic X-rays was measured with use of a rotating collimator system borne on a sounding rocket. A part of background counts proportional to the field of view of proportional counters enabled us to determine the intensity of the diffuse component to be 0.66±0.07 photons cm−2 sec−1 keV−1 in the energy range between 3.6 and 9.0 keV. The spectrum in this energy range was found to be comparatively flat. The intensity of Sco X-1 was also measured and its time variation was investigated.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bleeker, J. A. M., Burger, J. J., Scheepmaker, A., Swanenburg, B. N. andTanaka, Y.: 1966,Phys. Letters,21, 301.
Bleeker, J. A. M., Burger, J. J., Deerenberg, A. J. M., Scheepmaker, A., Swanenburg, B. N., Tanaka, Y., Hayakawa, S., Makino, F., andOgawa, H.: 1968,Can. J. Phys. 46, S461.
Chodil, G., Jopson, R. C., Mark, H., Seward, F. D., andSwift, C. D.: 1965,Phys. Rev. Letters 15, 605.
Chodil, G., Mark, H., Rodrigues, R., Seward, F. D., andSwift, C. D.: 1967a,Astrophys. J. 150, 57.
Chodil, G., Mark, H., Rodrigues, R., Seward, F. D., Swift, C. D., Hiltner, W. A., Wallerstein, G., andMannery, E. J.: 1967b,Phys. Rev. Letters,19, 681.
Chodil, G., Mark, H., Rodrigues, R., Seward, F. D., Swift, C. D., Turiel, I., Hiltner, W. A., Wallerstein, G., andMannery, E. J.: 1968,Astrophys. J. 154, 645.
Cooke, B. A., Pounds, K. A., Stewardson, E. A., andAdams, D. J.: 1967,Astrophys. J. 150, L189.
Felten, J. E. andMorrison, P. M.: 1966,Astrophys. J. 146, 686.
Fisher, P. C., Johnson, H. M., Jordan, W. C., Meyerott, A. J., andActon, L. W.: 1966,Astrophys. J. 143, 203.
Giacconi, R. andGursky, H.: 1965,Space Sci. Rev. 4, 151.
Giacconi, R., Gursky, H., Waters, J. R., Rossi, B., Clark, G., Garmire, G., Oda, M., andWada, M.: 1966, ‘High-Energy Astrophysics’,Intern. School of Phys. ‘Enrico Fermi’, Course 35, Academic Press, New York.
Gorenstein, P., Gursky, H., andGarmire, G.: 1967,Astrophys. J. 150, L25.
Gorenstein, P., Giacconi, R., andGursky, H.: 1968,Astrophys. J. 153, 885.
Gould, R. J. andBurbidge, G. R.: 1967, inHandbuch der Physik,26, 2, Springer, Berlin, p. 265.
Grader, R. J., Hill, R. W., Seward, F. D., andToor, A.: 1966,Science 152, 1499.
Green, D. W., Wilson, B. G., andBaxter, A. J.: 1968,Symposium on Small Rocket Instrumentations, COSPAR, Tokyo.
Harries, J. R. andFrancey, R. J.: 1968,Australian J. Phys. (in press).
Hayakawa, S., Matsuoka, M., andYamashita, K.: 1966a,Space Res. IV, p. 68.
Hayakawa, S., Matsuoka, M., andSugimoto, D.: 1966b,Space Sci. Rev. 5, 109.
Hayakawa, S., Matsuoka, M., andYamashita, K.: 1966c,Rep. Ionos. Space Res. Japan. 20, 480.
Hill, R. W., Grader, R. J., andSeward, F. W.: 1968,Astrophys. J. 154, 655.
Lewin, W. H. G., Clark, G. W., andSmith, W. B.: 1968,Astrophys. J. 152, L55.
Mandelštam, S. L. andTindo, I. P.: 1967,Soviet Phys. JETP. 6, 796.
Matsuoka, M., Oda, M., Ogawara, Y., Hayakawa, S., andKato, T.: 1968,Can. J. Phys. 46, S466.
Mook, D. E.: 1967,Astrophys. J. 150, L25.
Rochia, R., Rothenflug, R., Boclet, D., Ducros, G., andLabeyrie, J.: 1967,Space Res. VII, p. 1327.
Seward, F. D., Chodil, G., Mark, H., Swift, C. D. andToor, A.: 1967,Astrophys. J. 150, 845.
Wada, M., Matsuoka, M., Oda, M., Ogawara, Y., andKato, T.: 1968,Symposium on Small Rocket Instrumentations, COSPAR, Tokyo.
Wilson, B. G.: 1968,Rep. Inst. Space Aeronaut. Sci., Univ. of Tokyo,33, 289.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Matsuoka, M., Oda, M., Ogawara, Y. et al. Measurement of the absolute intensity of cosmic X-rays. Astrophys Space Sci 4, 44–63 (1969). https://doi.org/10.1007/BF00651262
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00651262