ASCA observations of the unidentified egret source 2EGS J1418-6049

Mallory Roberts, Roger W. Romani

    Research output: Contribution to journalArticle

    Abstract

    In a 40 ks ASCA exposure of the GeV EGRET error box of the unidentified source 2EGS J1418-6049, we observe diffuse emission surrounding several unusual hard spectrum X-ray sources. Two of these sources have plausible identifications as absorbed active galactic nuclei (AGNs). Our best candidate for the EGRET source counterpart is an extended nonthermal object, which we argue to be a wind nebula surrounding a pulsar with characteristic age τ ∼ 104.5 yr. We also discuss optical and radio data supporting the proposal that the GeV source is a young energetic pulsar. This analysis demonstrates how hard X-ray observations can significantly constrain the nature of GeV γ-ray sources.

    Original languageEnglish (US)
    Pages (from-to)827-832
    Number of pages6
    JournalAstrophysical Journal
    Volume496
    Issue number2 PART I
    DOIs
    StatePublished - Jan 1 1998

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    energetics
    radio
    pulsars
    nebulae
    active galactic nuclei
    boxes
    proposals
    rays
    x rays
    exposure
    analysis
    young

    Keywords

    • Galaxies: Active
    • Gamma rays: Observations
    • Pulsars: Individual (2EGS J1418-6049)

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    ASCA observations of the unidentified egret source 2EGS J1418-6049. / Roberts, Mallory; Romani, Roger W.

    In: Astrophysical Journal, Vol. 496, No. 2 PART I, 01.01.1998, p. 827-832.

    Research output: Contribution to journalArticle

    Roberts, Mallory ; Romani, Roger W. / ASCA observations of the unidentified egret source 2EGS J1418-6049. In: Astrophysical Journal. 1998 ; Vol. 496, No. 2 PART I. pp. 827-832.
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