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An infrared flash contemporaneous with the γ-rays of GRB 041219a

Author

Listed:
  • C. H. Blake

    (Harvard College Observatory)

  • J. S. Bloom

    (Harvard College Observatory
    University of California at Berkeley)

  • D. L. Starr

    (Gemini Observatory)

  • E. E. Falco

    (Smithsonian Astrophysical Observatory)

  • M. Skrutskie

    (University of Virginia)

  • E. E. Fenimore

    (Los Alamos National Laboratory)

  • G. Duchêne

    (Observatoire de Grenoble)

  • A. Szentgyorgyi

    (Smithsonian Astrophysical Observatory)

  • S. Hornstein

    (University of California)

  • J. X. Prochaska

    (UCO/Lick Observatory)

  • C. McCabe

    (California Institute of Technology)

  • A. Ghez

    (University of California)

  • Q. Konopacky

    (University of California)

  • K. Stapelfeldt

    (California Institute of Technology)

  • K. Hurley

    (University of California)

  • R. Campbell

    (W.M. Keck Observatories)

  • M. Kassis

    (W.M. Keck Observatories)

  • F. Chaffee

    (W.M. Keck Observatories)

  • N. Gehrels

    (NASA Goddard Space Flight Center)

  • S. Barthelmy

    (NASA Goddard Space Flight Center)

  • J. R. Cummings

    (NASA Goddard Space Flight Center)

  • D. Hullinger

    (NASA Goddard Space Flight Center
    University of Maryland)

  • H. A. Krimm

    (NASA Goddard Space Flight Center
    Universities Space Research Association)

  • C. B. Markwardt

    (NASA Goddard Space Flight Center
    University of Maryland)

  • D. Palmer

    (Los Alamos National Laboratory)

  • A. Parsons

    (NASA Goddard Space Flight Center)

  • K. McLean

    (Los Alamos National Laboratory)

  • J. Tueller

    (NASA Goddard Space Flight Center)

Abstract

The explosion that results in a cosmic γ-ray burst (GRB) is thought to produce emission from two physical processes: the central engine gives rise to the high-energy emission of the burst through internal shocking1, and the subsequent interaction of the flow with the external environment produces long-wavelength afterglows2,3,4. Although observations of afterglows5 continue to refine our understanding of GRB progenitors and relativistic shocks, γ-ray observations alone have not yielded a clear picture of the origin of the prompt emission6 nor details of the central engine. Only one concurrent visible-light transient has been found7 and it was associated with emission from an external shock. Here we report the discovery of infrared emission contemporaneous with a GRB, beginning 7.2 minutes after the onset of GRB 041219a (ref. 8). We acquired 21 images during the active phase of the burst, yielding early multi-colour observations. Our analysis of the initial infrared pulse suggests an origin consistent with internal shocks.

Suggested Citation

  • C. H. Blake & J. S. Bloom & D. L. Starr & E. E. Falco & M. Skrutskie & E. E. Fenimore & G. Duchêne & A. Szentgyorgyi & S. Hornstein & J. X. Prochaska & C. McCabe & A. Ghez & Q. Konopacky & K. Stapelfe, 2005. "An infrared flash contemporaneous with the γ-rays of GRB 041219a," Nature, Nature, vol. 435(7039), pages 181-184, May.
    • Handle: RePEc:nat:nature:v:435:y:2005:i:7039:d:10.1038_nature03520
    DOI: 10.1038/nature03520
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