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Phys. Rev. Lett. 9, 439–443 (1962)

Evidence for x Rays From Sources Outside the Solar System

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Riccardo Giacconi, Herbert Gursky, and Frank R. Paolini
American Science and Engineering, Inc., Cambridge, Massachusetts

Bruno B. Rossi
Massachusetts Institute of Technology, Cambridge, Massachusetts

Received 12 October 1962; published in the issue dated 1 December 1962

See accompanying Physics Focus

© 1962 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.9.439
DOI:
10.1103/PhysRevLett.9.439
PACS: