J/ApJ/736/138ivo://CDS.VizieR/J/ApJ/736/138doi:10.26093/cds/vizier.17360138CDSGavriil F.P.Dib R.Kaspi V.M.2013-02-16T14:12:30Z2013-01-28T13:52:33ZCDS support team

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

cds-question@unistra.frx-ray-sourcespulsarsAfter at least six years of quiescence, anomalous X-ray pulsar (AXP) 4U 0142+61 entered an active phase in 2006 March that lasted several months and included six X-ray bursts as well as many changes in the persistent X-ray emission. The bursts, the first seen from this AXP in >11yr of Rossi X-Ray Timing Explorer monitoring, all occurred in the interval between 2006 April 6 and 2007 February 7. The burst durations ranged from (0.4-1.8)x10^3^s. The first five burst spectra are well modeled by blackbodies, with temperatures kT~2-9keV. However, the sixth burst had a complicated spectrum that is well characterized by a blackbody plus two emission features whose amplitude varied throughout the burst. The most prominent feature was at 14.0keV. Upon entry into the active phase, the pulsar showed a significant change in pulse morphology and a likely timing glitch. The glitch had a total frequency jump of (1.9+/-0.4)x10^-7^Hz, which recovered with a decay time of 17+/-2 days by more than the initial jump, implying a net spin-down of the pulsar. Within the framework of the magnetar model, the net spin-down of the star could be explained by regions of the superfluid that rotate slower than the rest. The bursts, flux enhancements, and pulse morphology changes can be explained as arising from crustal deformations due to stresses imposed by the highly twisted internal magnetic field. However, unlike other AXP outbursts, we cannot account for a major twist being implanted in the magnetosphere.2011ApJ...736..138Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/736/138CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2012)B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center, 2012)VI/117 : Observation Log from ASCA (PLAIN Center, 2001)IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)J/A+A/545/A27 : INTEGRAL/IBIS 9yr Galactic Hard X-Ray Survey (Krivonos+, 2012)J/AJ/141/129 : Chandra Transmission Grating Data Cat. (Huenemoerder+, 2011)J/A+A/522/A68 : Variable sources detected by INTEGRAL (Telezhinsky+, 2010)J/A+A/493/339 : XMM-Newton serendipitous Survey. V. (Watson+, 2009)J/ApJS/179/360 : Thermonuclear X-ray bursts observed by RXTE (Galloway+, 2008)J/A+A/467/585 : Sources detected by ISGRI (Bodaghee+, 2007)J/A+A/416/1037 : BVRIK Photometry for the field of 4U 0142+61 (Hulleman+, 2004)J/A+A/411/L59 : INTEGRAL reference catalog (Ebisawa+, 2003)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/736/138https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/736/138http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/736/138https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/736/138https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/736/138http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/736/138GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapX-rayRadiodefaultJ/ApJ/736/138/table3RXTE timing observation log for 4U 0142+61Exp[0.7/19.7] Exposure timekstime.duration;obs.exposurefloatTOA[1/94] Time of arrival (TOA) number (1)meta.idintprimaryRXTERXTE observation identification numbermeta.id;obscharPCUs[1/4] Effective number of Proportional Counter Units (PCUs) on during observationmeta.numberintMJD1Modified Julian Date of Set 1 barycentered pulse (2)dtime.epochdoublee_MJD1Uncertainty in MJD1sstat.errorfloatMJD2Modified Julian Date of Set 2 barycentered pulse (2)dtime.epochdoublee_MJD2Uncertainty in MJD2sstat.errorfloatMJD3Modified Julian Date of Set 3 barycentered pulse (2)dtime.epochdoublee_MJD3Uncertainty in MJD3sstat.errorfloatPT[Yes/No ] TOA included in partial timing analysis? (Note that all TOAs were included in the long-term analysis)meta.codechar