J/A+A/584/A41ivo://CDS.VizieR/J/A+A/584/A41doi:10.26093/cds/vizier.35840041CDSMaitra C.Ballet J.Filipovic M.D.Haberl F.Tiengo A.Grieve K.,Roper Q.2017-01-18T16:02:48Z2015-11-18T09:31:05ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frmagellanic-cloudssupernova-remnantsx-ray-sourcesIKT 16 is an X-ray and radio-faint supernova remnant (SNR) in the Small Magellanic Cloud (SMC). A detailed X-ray study of this SNR with XMM-Newton confirmed the presence of a hard X-ray source near its centre, indicating the detection of the first composite SNR in the SMC. With a dedicated Chandra observation we aim to resolve the point source and confirm its nature. We also acquire new ATCA observations of the source at 2.1GHz with improved flux density estimates and resolution. We perform detailed spatial and spectral analysis of the source. With the highest resolution X-ray and radio image of the centre of the SNR available today, we resolve the source and confirm its pulsar wind nebula (PWN) nature. Further, we constrain the geometrical parameters of the PWN and perform spectral analysis for the point source and the PWN separately. We also test for the radial variations of the PWN spectrum and its possible east west asymmetry. The X-ray source at the centre of IKT 16 can be resolved into a symmetrical elongated feature centring a point source, the putative pulsar. Spatial modelling indicates an extent of 5.2" of the feature with its axis inclined at 82{deg} east from north, aligned with a larger radio feature consisting of two lobes almost symmetrical about the X-ray source. The picture is consistent with a PWN which has not yet collided with the reverse shock. The point source is about three times brighter than the PWN and has a hard spectrum of spectral index 1.1 compared to a value 2.2 for the PWN. This points to the presence of a pulsar dominated by non-thermal emission. The expected dE/dt is ~10^37^erg/s and spin period <100ms. However, the presence of a compact nebula unresolved by Chandra at the distance of the SMC cannot completely be ruled out.2015A&A...584A..41Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/584/A41CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/584/A41https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/584/A41http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/584/A41https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/584/A41https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/584/A41http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/584/A41GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/584/A41/list (Informations on fits images)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/584/A41/list?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/584/A41/list?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/584/A41/list?GETtext/xml+votable180.050000true14.57423-72.30160.005555555555555556Associated datahttps://cdsarc.cds.unistra.fr/assocdata/?obs_collection=J/A+A/584/A416/33317 33328https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/584/A41?format=asciiX-raydefaultJ/A+A/584/A41/listInformations on fits imagesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRAJ2000Right ascension of image center (J2000)degpos.eq.ra;meta.mainDEJ2000Declination of image center (J2000)degpos.eq.dec;meta.mainNx[50/780] Number of pixels along X-axismeta.numberintNy[40/760] Number of pixels along Y-axismeta.numberintObs.DateObservation date (YYYY-MM-DDThh:mm:ss)time.epoch;obscharsize[22/4717] Size of the fits fileKibytephys.size;meta.fitsintFileNameName of the fits file in subdirectory fitsmeta.id;meta.fitscharTitleTitle of the filemeta.title;meta.filechar