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arXiv · 1607.03778

Gamma-ray upper limits on magnetars with 6 years of Fermi-LAT observations

Jian Li·Nanda Rea·Diego F. Torres·Emma de Ona-Wilhelmi
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Abstract

We report on the search for gamma-ray emission from 20 magnetars using 6 years of Fermi, Large Area Telescope (LAT) 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 $\sim10^{-12}-10^{-11}$ erg s$^{-1}$ cm$^{-2}$. Gamma-ray pulsations were searched for the four magnetars having reliable ephemerides over the observing period, but none were detected. On the other hand, we also studied the gamma-ray morphology and spectra of seven Supernova Remnants associated or adjacent to the magnetars.

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Jian Li, Nanda Rea, Diego F. Torres, Emma de Ona-Wilhelmi. 2016-07-13. Gamma-ray upper limits on magnetars with 6 years of Fermi-LAT observations. https://doi.org/10.3847/1538-4357%2F835%2F1%2F30

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