Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-25T17:03:27.387Z Has data issue: false hasContentIssue false
  • English
  • Français

Recent Results on Extragalactic Cosmic X-Ray Sources from Rocket and Balloon Flights*

Published online by Cambridge University Press:  30 March 2016

G. W. Clark
G. W. Clark*
Affiliation:
Massachusetts Institute of Technology, Cambridge, Mass., U.S.A.

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Two experiments carried out recently at M.I.T. gave results which bear on the problems of extragalactic X-ray sources. One of these is the work of a group under the direction of Hale Bradt (Bradt et al., 1967), who used an attitude-controlled Aerobee rocket to scan a portion of the sky which included the radio galaxy M 87 (Virgo A). Among their detectors were two banks of argon-filled, 2 mil beryllium window proportional counters, each with an effective area of 350 cm2 and a mechanical collimator giving a 2° × 20° FWHM field of view. The fields of view were crossed so that their long directions made an angle of 60° with one another. Aspect was determined to within 5 min of arc by star photography.

Type
Joint Discussions
Information
Highlights of Astronomy , Volume 1: Highlights of Astronomy. As presented at the XIIIth General Assembly of the IAU, 1967 , 1968 , pp. 184 - 187
Copyright
Copyright © Reidel 1968

Footnotes

*

This work was supported in part by the National Aeronautics and Space Administration under Contracts NSR22-009-129 and NsG-386, and in part by the U.S. Atomic Energy Commission under contract AT(30-1)-2098.

References

Boldt, E., McDonald, F.B., Riegler, G., Serlemitsos, P. (1966) Phys. Rev. Letters, 17, 447.Google Scholar
Bradt, H., Mayer, W., Naranan, S., Rappaport, S., Spada, G. (1967) Astrophys. J. (Letters), 150, 199.CrossRefGoogle Scholar
Byram, E.T., Chubb, T.A., Friedman, H. (1967) Science, 152, 66.Google Scholar
Clark, G., Lewin, W., Smith, W. (1968) Astrophys. J., 151, 21.Google Scholar
Feiten, J.E., Gould, R.J., Stein, W.A., Woolf, N.J. (1967) Astrophys. J., 146, 955.Google Scholar
Garmire, G. (1967) private communication.Google Scholar
Lewin, W., Clark, G., Smith, W. (1967) Astrophys. J. (Letters), 150, 153.Google Scholar
Peterson, L., Jacobsen, A. (1966) Astrophys. J., 145, 962.Google Scholar