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Chandra View of the Warm-hot Intergalactic Medium toward 1ES 1553+113: Absorption-line Detections and Identifications. I.

Research output: Contribution to journalArticle

  • F. Nicastro
  • M. Elvis
  • Y. Krongold
  • S. Mathur
  • A. Gupta
  • C. Danforth
  • X. Barcons
  • S. Borgani
  • E. Branchini
  • R. Cen
  • R. Davé
  • J. Kaastra
  • F. Paerels
  • L. Piro
  • J. M. Shull
  • Y. Takei
  • L. Zappacosta

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Original languageEnglish
Pages (from-to)90
JournalAstrophysical Journal
Issue number2
Publication statusPublished - 7 May 2013


We present the first results from our pilot 500 ks Chandra Low Energy Transmission Grating Large Program observation of the soft X-ray brightest source in the z >~ 0.4 sky, the blazar 1ES 1553+113, aimed to secure the first uncontroversial detections of the missing baryons in the X-rays. We identify a total of 11 possible absorption lines, with single-line statistical significances between 2.2σ and 4.1σ. Six of these lines are detected at high single-line statistical significance (3.6

    Research areas

  • atomic processes, intergalactic medium, line: identification, opacity, X-rays: general

ID: 57686432