J/ApJ/687/1230ivo://CDS.VizieR/J/ApJ/687/1230doi:10.26093/cds/vizier.16871230CDSSidoli L.Romano P.Mangano V.Pellizzoni A.Kennea J.A.Cusumano G.,Vercellone S.Paizis A.Burrows D.N.Gehrels N.2017-09-22T16:15:53Z2011-01-25T13:59:14ZCDS support team

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

cds-question@unistra.frx-ray-sourcesx-ray-binary-starsSupergiant fast X-ray transients (SFXTs) are a new class of high-mass X-ray binaries (HMXBs) discovered thanks to the monitoring of the Galactic plane performed with the INTEGRAL satellite in the last 5 years. To characterize the properties of these sources on timescales of months, we are performing a monitoring campaign with Swift of four SFXTs (IGR J16479-4514, XTE J1739-302, IGR J17544-2619, and AX J1841.0-0536/IGR J18410-0535). We report on the first 4 months of Swift observations, which started on 2007 October 26. We detect low-level X-ray activity in all four SFXTs, which demonstrates that these transient sources accrete matter even outside their outbursts. The X-ray spectra are typically hard, with an average 2-10keV luminosity during this monitoring of about 10^33^-10^34^erg/s. We detected pulsations from the pulsar AX J1841.0-0536/IGR J18410-0535, with a period of 4.7008+/-0.0004s.2008ApJ...687.1230Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/687/1230CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/106 : Catalogue of X-ray binaries (Liu+ 2001)J/A+A/411/L59 : INTEGRAL reference catalog (Ebisawa+, 2003)J/A+A/448/L9 : Position catalogue of Swift XRT afterglows (Moretti+, 2006)J/PAZh/32/508 : Hard X-ray Bursts by INTEGRAL in 2003-2004 (Chelovekov+,J/A+A/523/A61 : INTEGRAL all-sky survey of hard X-ray sources (Krivonos+,J/MNRAS/397/1177 : Swift-XRT rlts of GRBs (Evans+, 2009)J/ApJS/186/378 : Hard X-ray survey from Swift-BAT 2004-2006 (Tueller+, 2010)http://www.swift.psu.edu/xrt : Swift X-Ray Telescope (XRT) home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/687/1230https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/687/1230http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/687/1230https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/687/1230https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/687/1230http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/687/1230GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/ApJ/687/1230/table1 (Observation log)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/687/1230/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/687/1230/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/687/1230/table1?GETtext/xml+votable180.050000true251.9958333-45.21666670.0055555555555555566/28826 28875 30244 42207https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJ/687/1230?format=asciiX-raydefaultJ/ApJ/687/1230/table1Observation logrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameSource name (IGR or XTE)meta.id;meta.maincharSeqSwift sequence identification (1)meta.id;obscharn_Seq[Bcd] observation origin (2)meta.notecharModeSwift Instrument/Mode configurationphys.atmol.configuration;instr.setupcharbegStart UT datestime.startnullableendEnd UT datestime.endnullableExp? Net exposure time (3)stime.duration;obs.exposure;src.netintnullableSimbadSimbad column added by the CDSchar_RAPositions from Simbad (right ascension part)degpos.eq.ra;meta.main_DEPositions from Simbad (declination part)degpos.eq.dec;meta.main