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

Abstract

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.

Authors:
; ; ;  [1]
  1. Institute of Space Sciences (IEEC–CSIC), Campus UAB, Carrer de Magrans s/n, E-08193 Barcelona (Spain)
Publication Date:
OSTI Identifier:
22664036
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 835; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; EMISSION; GAMMA RADIATION; GAMMA SOURCES; GEV RANGE 01-10; NEUTRON STARS; PULSATIONS; SUPERNOVA REMNANTS; TELESCOPES; X RADIATION

Citation Formats

Li, Jian, Rea, Nanda, Torres, Diego F., and De Oña-Wilhelmi, Emma. GAMMA-RAY UPPER LIMITS ON MAGNETARS WITH SIX YEARS OF FERMI -LAT OBSERVATIONS. United States: N. p., 2017. Web. doi:10.3847/1538-4357/835/1/30.
Li, Jian, Rea, Nanda, Torres, Diego F., & De Oña-Wilhelmi, Emma. GAMMA-RAY UPPER LIMITS ON MAGNETARS WITH SIX YEARS OF FERMI -LAT OBSERVATIONS. United States. doi:10.3847/1538-4357/835/1/30.
Li, Jian, Rea, Nanda, Torres, Diego F., and De Oña-Wilhelmi, Emma. Fri . "GAMMA-RAY UPPER LIMITS ON MAGNETARS WITH SIX YEARS OF FERMI -LAT OBSERVATIONS". United States. doi:10.3847/1538-4357/835/1/30.
@article{osti_22664036,
title = {GAMMA-RAY UPPER LIMITS ON MAGNETARS WITH SIX YEARS OF FERMI -LAT OBSERVATIONS},
author = {Li, Jian and Rea, Nanda and Torres, Diego F. and De Oña-Wilhelmi, Emma},
abstractNote = {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.},
doi = {10.3847/1538-4357/835/1/30},
journal = {Astrophysical Journal},
number = 1,
volume = 835,
place = {United States},
year = {Fri Jan 20 00:00:00 EST 2017},
month = {Fri Jan 20 00:00:00 EST 2017}
}