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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

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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

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