The Redshift of GRB 970508

  title={The Redshift of GRB 970508},
  author={Daniel E. Reichart},
  journal={The Astrophysical Journal Letters},
  pages={L99 - L101}
  • D. Reichart
  • Published 7 December 1997
  • Physics
  • The Astrophysical Journal Letters
GRB 970508 is the second gamma-ray burst (GRB) for which an optical afterglow has been detected. It is the first GRB for which a distance scale has been determined: absorption and emission features in spectra of the optical afterglow place GRB 970508 at a redshift of z ≥ 0.835. The lack of a Lyα forest in these spectra further constrains this redshift to be less than z~2.3. I show that the spectrum of the optical afterglow of GRB 970508, once corrected for Galactic absorption, is inconsistent… 


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