J/ApJ/819/40ivo://CDS.VizieR/J/ApJ/819/40doi:10.26093/cds/vizier.18190040CDSMarelli M.Pizzocaro D.De Luca A.Gastaldello F.Caraveo P.,Parkinson P.S.2018-05-16T07:00:35Z2018-02-05T13:10:03ZCDS support team

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

cds-question@unistra.frpulsarsx-ray-sourcesnebulaeWe analyzed a deep XMM-Newton observation of the radio-quiet {gamma}-ray PSR J2055+2539. The spectrum of the X-ray counterpart is nonthermal, with a photon index of {Gamma}=2.36+/-0.14 (1{sigma} confidence). We detected X-ray pulsations with a pulsed fraction of 25%+/-3% and a sinusoidal shape. Taking into account considerations on the {gamma}-ray efficiency of the pulsar and on its X-ray spectrum, we can infer a pulsar distance ranging from 450 to 750 pc. We found two different nebular features associated with PSR J2055+2539 and protruding from it. The angle between the two nebular main axes is ~162.8{deg}+/-0.7{deg}. The main, brighter feature is 12' long and <20" thick, characterized by an asymmetry with respect to the main axis that evolves with the distance from the pulsar, possibly forming a helical pattern. The secondary feature is 250"x30". Both nebulae present an almost flat brightness profile with a sudden decrease at the end. The nebulae can be fitted by either a power-law model or a thermal bremsstrahlung model. A plausible interpretation of the brighter nebula is in terms of a collimated ballistic jet. The secondary nebula is most likely a classical synchrotron-emitting tail.2016ApJ...819...40Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/819/40CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toIX/50 : XMM-Newton Serendipitous Source Catalogue 3XMM-DR6J/A+A/428/383 : XMM-Newton Bright Serendipitous Survey (Della Ceca+, 2004)J/A+A/493/339 : XMM-Newton serendipitous Survey. V. (Watson+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/819/40https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/819/40http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/819/40https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/819/40https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/819/40http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/819/40GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/819/40/table1 (Analysis of the Brightest Serendipitous Sources in the XMM-Newton FOV)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/819/40/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/819/40/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/819/40/table1?GETtext/xml+votable180.050000true313.9614325.67988610.0055555555555555566/13095 13106https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/819/40?format=asciiRadioX-raydefaultJ/ApJ/819/40/table1Analysis of the Brightest Serendipitous Sources in the XMM-Newton FOVrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSource[1/61] Source numbermeta.idintRAJ2000Right Ascension in decimal degrees (J2000) (1)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000) (1)degpos.eq.dec;meta.mainModelStatistically acceptable spectral model(s) fitstat.fit.param;meta.modelledcharl_NH[<] Limit flag on NHmeta.code.errorcharNHHydrogen column density1e+21cm**-2phys.columnDensitycharE_NH? Upper 1{sigma} limit uncertainty in NH1e+21cm**-2stat.error;stat.maxfloatnullablee_NH? Lower 1{sigma} limit uncertainty in NH1e+21cm**-2stat.errorfloatnullablel_NH1[<] Limit flag on NH1meta.code.errorcharNH1? Hydrogen column density for the other fitting model1e+21cm**-2phys.columnDensityfloatnullableE_NH1? Upper 1{sigma} limit uncertainty in NH11e+21cm**-2stat.error;stat.maxfloatnullablee_NH1? Lower 1{sigma} limit uncertainty in NH11e+21cm**-2stat.errorfloatnullablel_logFX/Fopt[>] Limit flag on logFX/Foptmeta.code.errorcharlogFX/Fopt? X-ray-to-optical flux ratiophot.flux;arith.ratiodoublenullableu_logFX/Fopt[?] Uncertainty flag on logFX/Foptmeta.code.errorcharlogFX/Fopt2? Second value of logFX/Foptphot.flux;arith.ratiofloatnullablen_logFX/Fopt[B V V*] Note on logFX/Fopt (2)meta.notecharl_logFX/Fopt1[>] Limit flag on logFX/Fopt1meta.code.errorcharlogFX/Fopt1? X-ray-to-optical flux ratio for the other fitting modelphot.flux;arith.ratiofloatnullablen_logFX/Fopt1[B V V*] Note on logFX/Fopt1 (2)meta.notecharIDResulting identification of the sourcesrc.classcharn_ID[b] Note on ID (3)meta.notechar