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An unexpectedly rapid decline in the X-ray afterglow emission of long γ-ray bursts

Author

Listed:
  • G. Tagliaferri

    (INAF – Osservatorio Astronomico di Brera)

  • M. Goad

    (University of Leicester)

  • G. Chincarini

    (INAF – Osservatorio Astronomico di Brera
    Università degli studi di Milano-Bicocca)

  • A. Moretti

    (INAF – Osservatorio Astronomico di Brera)

  • S. Campana

    (INAF – Osservatorio Astronomico di Brera)

  • D. N. Burrows

    (Pennsylvania State University
    Pennsylvania State University)

  • M. Perri

    (ASI Science Data Center)

  • S. D. Barthelmy

    (NASA Goddard Space Flight Center)

  • N. Gehrels

    (NASA Goddard Space Flight Center)

  • H. Krimm

    (NASA Goddard Space Flight Center
    Universities Space Research Association)

  • T. Sakamoto

    (NASA Goddard Space Flight Center
    National Research Council)

  • P. Kumar

    (University of Texas)

  • P. I. Mészáros

    (Pennsylvania State University
    Pennsylvania State University)

  • S. Kobayashi

    (Pennsylvania State University
    Pennsylvania State University)

  • B. Zhang

    (University of Nevada)

  • L. Angelini

    (NASA Goddard Space Flight Center
    Johns Hopkins University)

  • P. Banat

    (INAF – Osservatorio Astronomico di Brera)

  • A. P. Beardmore

    (University of Leicester)

  • M. Capalbi

    (ASI Science Data Center)

  • S. Covino

    (INAF – Osservatorio Astronomico di Brera)

  • G. Cusumano

    (INAF – Istituto di Astrofisica Spaziale e Cosmica)

  • P. Giommi

    (ASI Science Data Center)

  • O. Godet

    (University of Leicester)

  • J. E. Hill

    (Pennsylvania State University
    Pennsylvania State University)

  • J. A. Kennea

    (Pennsylvania State University
    Pennsylvania State University)

  • V. Mangano

    (INAF – Istituto di Astrofisica Spaziale e Cosmica)

  • D. C. Morris

    (Pennsylvania State University
    Pennsylvania State University)

  • J. A. Nousek

    (Pennsylvania State University
    Pennsylvania State University)

  • P. T. O'Brien

    (University of Leicester)

  • J. P. Osborne

    (University of Leicester)

  • C. Pagani

    (INAF – Osservatorio Astronomico di Brera
    Pennsylvania State University
    Pennsylvania State University)

  • K. L. Page

    (University of Leicester)

  • P. Romano

    (INAF – Osservatorio Astronomico di Brera)

  • L. Stella

    (INAF-Osservatorio Astronomico di Roma)

  • A. Wells

    (University of Leicester)

Abstract

Swift response The Swift satellite, launched in November last year, is designed to study γ-ray bursts (GRBs) as soon as they happen. GRBs are the most powerful explosions known in the Universe, and Swift's ability to study the early phases of the X-ray afterglow was expected to yield exciting results. Swift has now bagged its first two long GRBs: in both, the X-ray afterglow emission declined rapidly in the first few hundred seconds, then flattened out. The steep decline was unexpected, and neither it nor the spectral properties of the afterglow can be explained by current models.

Suggested Citation

  • G. Tagliaferri & M. Goad & G. Chincarini & A. Moretti & S. Campana & D. N. Burrows & M. Perri & S. D. Barthelmy & N. Gehrels & H. Krimm & T. Sakamoto & P. Kumar & P. I. Mészáros & S. Kobayashi & B. Zh, 2005. "An unexpectedly rapid decline in the X-ray afterglow emission of long γ-ray bursts," Nature, Nature, vol. 436(7053), pages 985-988, August.
    • Handle: RePEc:nat:nature:v:436:y:2005:i:7053:d:10.1038_nature03934
    DOI: 10.1038/nature03934
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