Polarization of the Crab pulsar and nebula as observed by the Integral/IBIS telescope

Abstract

Neutron stars generate powerful winds of relativistic particles that form bright synchrotron nebulae around them. Polarimetry provides a unique insight into the geometry and magnetic configuration of the wind, but high-energy measurements have failed until recently. The Integral-IBIS telescope has been used in its Compton mode to search for linearly polarized emission for energies above 200 keV from the Crab nebula. The asymmetries in the instrument response are small and we obtain evidences for a strongly polarized signal at an angle parallel to the pulsar rotation axis. This result confirms the detection recently reported by Dean et al. (2008), and extends the polarization measure for all the pulsar's phases. The hard X-ray/soft $\gamma$-ray observations therefore probe the inner jets or equatorial flow of the wind. The achieved sensitivity opens a new window for polarimetric studies at energies above 200 keV.

arXiv commentAccepted by ApJ Letters (15 pages, 2 figures)

References in corpus (11)

• ISGRI: the INTEGRAL Soft Gamma-Ray Imager
• The Crab Nebula and Pulsar between 500 GeV and 80 TeV: Observations with the HEGRA stereoscopic air Cherenkov telescopes
• Fitting Pulsar Wind Tori
• The Crab pulsar in the 0.75-30 MeV range as seen by CGRO COMPTEL
• Placing Confidence Limits on Polarization Measurements
• Polarisation studies of the prompt gamma-ray emission from GRB 041219a using the Spectrometer aboard INTEGRAL
• Simulated synchrotron emission from Pulsar Wind Nebulae
• Polarization of high-energy pulsar radiation in the striped wind model
• Polarization of high-energy emissions from the Crab pulsar
• Compton telescope with coded aperture mask: Imaging with the INTEGRAL/IBIS Compton mode
• Reconnection in pulsar winds

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