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Title: Search For Gamma-Ray Emission From Magnetars With The Fermi Large Area Telescope

Abstract

We report on the search for 0.1-10 GeV emission from magnetars in 17 months of Fermi Large Area Telescope (LAT) observations. No significant evidence for gamma-ray emission from any of the currently known magnetars is found. The most stringent upper limits to date on their persistent emission in the Fermi energy range are estimated between ~10 –12 and 10 –10 erg s –1 cm –2, depending on the source. We also searched for gamma-ray pulsations and possible outbursts, also with no significant detection. The upper limits derived support the presence of a cutoff at an energy below a few MeV in the persistent emission of magnetars. They also show the likely need for a revision of current models of outer-gap emission from strongly magnetized pulsars, which, in some realizations, predict detectable GeV emission from magnetars at flux levels exceeding the upper limits identified here using the Fermi-LAT observations.

Authors:
 [1]
  1. Naval Research Lab. (NRL), Washington, DC (United States); et al.
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
Fermi LAT Collaboration
OSTI Identifier:
1357513
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Astrophysical Journal Letters
Additional Journal Information:
Journal Volume: 725; Journal Issue: 1; Journal ID: ISSN 2041-8205
Publisher:
Institute of Physics (IOP)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Abdo, A. A. Search For Gamma-Ray Emission From Magnetars With The Fermi Large Area Telescope. United States: N. p., 2010. Web. doi:10.1088/2041-8205/725/1/L73.
Abdo, A. A. Search For Gamma-Ray Emission From Magnetars With The Fermi Large Area Telescope. United States. doi:10.1088/2041-8205/725/1/L73.
Abdo, A. A. Mon . "Search For Gamma-Ray Emission From Magnetars With The Fermi Large Area Telescope". United States. doi:10.1088/2041-8205/725/1/L73. https://www.osti.gov/servlets/purl/1357513.
@article{osti_1357513,
title = {Search For Gamma-Ray Emission From Magnetars With The Fermi Large Area Telescope},
author = {Abdo, A. A.},
abstractNote = {We report on the search for 0.1-10 GeV emission from magnetars in 17 months of Fermi Large Area Telescope (LAT) observations. No significant evidence for gamma-ray emission from any of the currently known magnetars is found. The most stringent upper limits to date on their persistent emission in the Fermi energy range are estimated between ~10–12 and 10–10 erg s–1 cm–2, depending on the source. We also searched for gamma-ray pulsations and possible outbursts, also with no significant detection. The upper limits derived support the presence of a cutoff at an energy below a few MeV in the persistent emission of magnetars. They also show the likely need for a revision of current models of outer-gap emission from strongly magnetized pulsars, which, in some realizations, predict detectable GeV emission from magnetars at flux levels exceeding the upper limits identified here using the Fermi-LAT observations.},
doi = {10.1088/2041-8205/725/1/L73},
journal = {Astrophysical Journal Letters},
number = 1,
volume = 725,
place = {United States},
year = {2010},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 28 works
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    Works referencing / citing this record:

    The Outburst Decay of the low Magnetic Field Magnetar sgr 0418+5729
    journal, May 2013