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Discovery of a pulsar wind nebula associated with IGR J18490-0000

Abstract : The IBIS/ISGRI camera on board the INTEGRAL observatory has performed a full survey of the Galactic disk in the hard X-ray regime from 20 keV up to several hundred of keV with an unprecedented sensitivity and angular resolution in this energy range. Among a large number of compact binary systems, this survey has revealed a number of unidentified objects. Using X-ray observations of one of these sources, IGR J18490-0000, we discovered a rather bright non-thermal pointlike object surrounded by an extended diffuse nebula compatible with the Integral position. The morphology and spectral behaviour of both pointlike and extended X-ray emissions are reminiscent of a young pulsar wind nebula of a few thousands years. The H.E.S.S. Array has observed the region and we present the TeV detection of the object. We compare this object to other PWNe visible in the hard X-ray and TeV regime.
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Submitted on : Monday, March 16, 2009 - 4:53:19 PM
Last modification on : Friday, November 6, 2020 - 3:33:39 AM

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R. Terrier, F. Mattana, A. Djannati-Ataï, V. Marandon, M. Renaud, et al.. Discovery of a pulsar wind nebula associated with IGR J18490-0000. 4th International Meeting on High Energy Gamma-Ray Astronomy, Jul 2008, Heidelberg, Germany. pp.312-315, ⟨10.1063/1.3076669⟩. ⟨in2p3-00368513⟩

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