GAMMA-RAY UPPER LIMITS on MAGNETARS with SIX YEARS of FERMI-LAT OBSERVATIONS

Jian Li, Nanda Rea, Diego F. Torres, Emma De Oña-Wilhelmi

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    24 Citations (Scopus)

    Abstract

    © 2017. The American Astronomical Society. All rights reserved. We report on the search for gamma-ray emission from 20 magnetars using six years of Fermi Large Area Telescope observations. No significant evidence for gamma-ray emission from any of the currently known magnetars is found. We derived the most stringent upper limits to date on the 0.1-10 GeV emission of Galactic magnetars, which are estimated between ∼10-12 and 10-11 erg s-1 cm-2. We searched gamma-ray pulsations for the four magnetars having reliable ephemerides over the observing period, but detected none. We also report updated morphologies and spectral properties of seven spatially extended gamma-ray sources, which are most likely attributed to supernova remnants associated with or adjacent to the magnetars.
    Original languageEnglish
    Article number30
    JournalAstrophysical Journal
    Volume835
    Issue number1
    DOIs
    Publication statusPublished - 20 Jan 2017

    Keywords

    • gamma-rays: stars
    • stars: magnetars
    • X-rays: stars

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