IXPE data on magnetar 1E 1547.0-5408 show high linear polarization from a small hot spot whose phase-dependent angle is fit by a rotating vector model, with a marginal energy-dependent dip in polarization degree that may indicate vacuum resonance but does not constitute compelling evidence for biref
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Equatorial twist geometry in the magnetar magnetosphere allows resonant Compton upscattering to reproduce the hard X-ray spectrum of 4U 0142+61 with optical depth limits from resonant cooling.
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The long quest for vacuum birefringence in magnetars: 1E 1547.0-5408 and the elusive smoking gun
IXPE data on magnetar 1E 1547.0-5408 show high linear polarization from a small hot spot whose phase-dependent angle is fit by a rotating vector model, with a marginal energy-dependent dip in polarization degree that may indicate vacuum resonance but does not constitute compelling evidence for biref
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Resonant Inverse Compton Scattering and Hard X-ray Emission in Magnetar Magnetospheres
Equatorial twist geometry in the magnetar magnetosphere allows resonant Compton upscattering to reproduce the hard X-ray spectrum of 4U 0142+61 with optical depth limits from resonant cooling.