EDP Sciences
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Volume 477, Number 1, January I 2008
Page(s) 249 - 253
Section Stellar structure and evolution
DOI http://dx.doi.org/10.1051/0004-6361:20078432

A&A 477, 249-253 (2008)
DOI: 10.1051/0004-6361:20078432

INTEGRAL detection of the pulsar wind nebula in PSR J1846-0258

V. A. McBride1, A. J. Dean1, A. Bazzano2, A. J. Bird1, A. B. Hill1, A. De Rosa2, R. Landi3, V. Sguera3, and A. Malizia3

1  School of Physics & Astronomy, University of Southampton, Highfield, SO17 1BJ, UK
    e-mail: vanessa@soton.ac.uk
2  INAF/IASF, via del Fosso del Cavaliere 100, Roma 00113, Italy
3  INAF/IASF, via P. Gobetti 101, Bologna 40129, Italy

(Received 7 August 2007 / Accepted 26 October 2007 )

Aims.We communicate the detection of soft (20-200 keV) $\gamma$-rays from the pulsar and pulsar wind nebula of PSR J1846-0258 and aim to identify the component of the system which is responsible for the $\gamma$-ray emission.
Methods.We combine spectral information from the INTEGRAL $\gamma$-ray mission with archival data from the Chandra X-ray Observatory to pinpoint the source of soft $\gamma$-ray emission.
Results.Our analysis shows that the soft $\gamma$-rays detected from PSR J1846-0258 include emission from both the pulsar and the pulsar wind nebula, but the measured spectral shape is dominated by the pulsar wind nebula. We discuss PSR J1846-0258 in the context of rotation-powered pulsars with high magnetic field strengths and review the anomalously high fraction of spin-down luminosity converted into X- and $\gamma$-ray emission in light of a possible overestimate of the distance to this pulsar.

Key words: stars: pulsars: individual: PSR J1846-0258 -- ISM: supernova remnants -- gamma rays: observations

© ESO 2007