A Possible Magnetar Nature for IGR J16358-4726

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dc.creatorPatel, S. K.
dc.creatorZurita, J.
dc.creatorDel Santo, M.
dc.creatorFinger, M.
dc.creatorKouveliotou, C.
dc.creatorEichler, D.
dc.creatorGogus, E.
dc.creatorUbertini, P.
dc.creatorWalter, R.
dc.creatorWoods, P.
dc.creatorWilson, C. A.
dc.creatorWachter, S.
dc.creatorBazzano, A.
dc.date2006-10-26
dc.date.accessioned2026-07-07T10:24:01Z
dc.date.available2026-07-07T10:24:01Z
dc.descriptionWe present detailed spectral and timing analysis of the hard x-ray transient IGR J16358-4726 using multi-satellite archival observations. A study of the source flux time history over 6 years, suggests that lower luminosity transient outbursts can be occuring in intervals of at most 1 year. Joint spectral fits of the higher luminosity outburst using simultaneous Chandra/ACIS and INTEGRAL/ISGRI data reveal a spectrum well described by an absorbed power law model with a high energy cut-off plus an Fe line. We detected the 1.6 hour pulsations initially reported using Chandra/ACIS also in the INTEGRAL/ISGRI light curve and in subsequent XMM-Newton observations. Using the INTEGRAL data we identified a spin up of 94 s (dP/dt = 1.6E-4), which strongly points to a neutron star nature for IGR J16358-4726. Assuming that the spin up is due to disc accretion, we estimate that the source magnetic field ranges between 10^13 - 10^15 G, depending on its distance, possibly supporting a magnetar nature for IGR J16358-4726.
dc.descriptionAccepted for publication in ApJ, 34 pgs, 14 figures, 4 tables
dc.identifierhttps://arxiv.org/abs/astro-ph/0610768
dc.identifierhttp://arxiv.org/abs/astro-ph/0610768
dc.identifierAstrophys.J.657:994-1003,2007
dc.identifierdoi:10.1086/510374
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/176040
dc.subjectAstrophysics
dc.titleA Possible Magnetar Nature for IGR J16358-4726
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