Gamma-ray bursts as x-ray depth gauges of the universe

P. Mészáros, M. J. Rees

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


We discuss the X-ray flux of gamma-ray burst afterglows at redshifts in the range 3-30, including the effects of the intergalactic He II absorption. We point out that strong X-ray lines may form locally in burst afterglows starting minutes after the trigger. This can provide distinctive X-ray distance indicators out to the redshifts at which the first generation of massive stars form.

Original languageEnglish (US)
Pages (from-to)L91-L94
JournalAstrophysical Journal
Issue number2 II
StatePublished - Jul 10 2003

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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