GAMMA-RAY UPPER LIMITS ON MAGNETARS WITH SIX YEARS OF FERMI -LAT OBSERVATIONS

Journal Article · Fri Jan 20 00:00:00 EST 2017 · Astrophysical Journal

DOI:https://doi.org/10.3847/1538-4357/835/1/30· OSTI ID:22664036

Li, Jian; Rea, Nanda; Torres, Diego F.; De Oña-Wilhelmi, Emma ^[1]

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1. Institute of Space Sciences (IEEC–CSIC), Campus UAB, Carrer de Magrans s/n, E-08193 Barcelona (Spain)

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{sup −12} and 10{sup −11} erg s{sup −1} cm{sup −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.

• OSTI ID: 22664036
• Journal Information: Astrophysical Journal, Vol. 835, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
EMISSION
GAMMA RADIATION
GAMMA SOURCES
GEV RANGE 01-10
NEUTRON STARS
PULSATIONS
SUPERNOVA REMNANTS
TELESCOPES
X RADIATION