Corrigendum | Published:

Corrections to Two Previous Articles on Extragalactic Gamma Rays and Implications of the Corrected Results

Nature volume 222, pages 11571158 (21 June 1969) | Download Citation

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Abstract

I REPORT here the correction of an error which, unfortunately, affects two articles of mine on extragalactic gamma radiation which appeared recently in Nature1,2. Equation (1) of ref. 1 should contain a factor of (1 + z)2 in the denominator instead of (1 + z)3. The same correction, applied to equation (12) of ref. 2, affects the index, α, of equation (15). This index then becomes 2 for a low density model and 1.5 for an Einstein–de Sitter model universe.

References

  1. 1.

    , Nature, 220, 675 (1968).

  2. 2.

    , Nature, 221, 425 (1969).

  3. 3.

    , and , Nature, 221, 1229 (1968).

  4. 4.

    , Phys. Rev. Lett., 18, 1011 (1967).

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Affiliations

  1. Theoretical Studies Branch, Goddard Space Flight Center, Greenbelt, Maryland.

    • F. W. STECKER

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DOI

https://doi.org/10.1038/2221157a0

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