J/MNRAS/412/1853ivo://CDS.VizieR/J/MNRAS/412/1853doi:10.26093/cds/vizier.74121853CDSStarling R.L.C.Evans P.A.Read A.M.Saxton R.D.Esquej P.Krimm H.,O'Brien P.T.Osborne J.P.Mateos S.Warwick R.Wiersema K.2024-07-13T20:14:57Z2011-12-09T12:07:39ZCDS support team

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

cds-question@unistra.frx-ray-sourcesinfrared-photometryvisible-astronomybroad-band-photometryultraviolet-astronomyWe present deep Swift follow-up observations of a sample of 94 unidentified X-ray sources from the XMM-Newton Slew Survey. The X-ray Telescope (XRT) on-board Swift detected 29 per cent of the sample sources; the flux limits for undetected sources suggest the bulk of the Slew Survey sources are drawn from one or more transient populations. We report revised X-ray positions for the XRT-detected sources, with typical uncertainties of 2.9 arcsec, reducing the number of catalogued optical matches to just a single source in most cases. We characterize the sources detected by Swift through their X-ray spectra and variability and via Ultraviolet-Optical Telescope photometry and using catalogued near-infrared, optical and radio observations of potential counterparts. Six sources can be associated with known objects and eight sources may be associated with unidentified ROSAT sources within the 3{sigma} error radii of our revised X-ray positions.2011MNRAS.412.1853Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/412/1853CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/480/611 : XMM-Newton slew survey catalogue, XMMSL1 (Saxton+, 2008)IX/28 : ROSAT HRI Pointed Observations (1RXH) (ROSAT Team, 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/412/1853https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/412/1853http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/412/1853https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/412/1853https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/412/1853http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/412/1853GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/412/1853/xrt (XRT observed sources; positions, modelisation and optical/near-IR matching sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/412/1853/xrt?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/412/1853/xrt?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/412/1853/xrt?GETtext/xml+votable180.050000true5.5124625.66780.005555555555555556Cone search capability for table J/MNRAS/412/1853/table6 (*UVOT photometry (observed magnitudes from a sum of all images))https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/412/1853/table6?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/412/1853/table6?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/412/1853/table6?GETtext/xml+votable180.050000true5.5128325.667710.0055555555555555566/4019 4382 6686 7022 10207 11574 12111 12147 13085 20288 21623 24885 25756 26860 34892 35852 37191 38971 39370 40255 42860 44202 44976 47666 47826 48481 489531.1166583743361574e-19 1.2058628298368645e-18https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/412/1853?format=asciiX-rayUVOpticalInfrareddefaultJ/MNRAS/412/1853/table1Swift XRT observations of unidentified XMM-Newton Slew Survey sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXMMSL1XMMSL1 source name (JHHMMSS.s+DDMMSS)meta.id;meta.maincharprimaryn_XMMSL1Simbad column added by the CDSmeta.ref.urlcharFCR? Slew count rate in full (0.2-12keV) bandct/sphot.count;em.X-rayfloatnullablee_FCR? rms uncertainty on FCRct/sstat.errorfloatnullableHCR? Slew count rate in hard (2-12keV) bandct/sphot.count;em.X-rayfloatnullablee_HCR? rms uncertainty on HCRct/sstat.errorfloatnullableSCR? Slew count rate in soft (0.2-2keV) bandct/sphot.count;em.X-rayfloatnullablee_SCR? rms uncertainty on SCRct/sstat.errorfloatnullableObsID? Swift obsIDmeta.noteintnullableDateObservation start, endtime.epochcharTexp? Exposure timekstime.duration;obs.exposurefloatnullablel_XRT[<=] Limit flag on XRTmeta.code.errorcharXRT? XRT count rate (1)ct/sphot.count;em.X-raydoublenullablee_XRT? rms uncertainty on XRTct/sstat.errorfloatnullableJ/MNRAS/412/1853/xrtXRT observed sources; positions, modelisation and optical/near-IR matching sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXMMSL1XMMSL1 source name (JHHMMSS.s+DDMMSS)meta.id;meta.maincharePos1Error on XMM position (radius, 90% containment)arcsecstat.error;phys.angSizeintRA2degXRT right ascension in decimal degrees (J2000)degpos.eq.raDE2degXRT declination in decimal degrees (J2000)degpos.eq.decdoubleePos2Error on XRT position (radius, 90% containment)arcsecstat.error;phys.angSizefloatn_ePos2[*] Position not UVOT enhanced (1)meta.notechardPosPosition differencearcsecpos;arith.difffloatGamma? Power-law photon index, {Gamma}meta.code;spect.indexfloatnullableE_Gamma? Error on Gamma (upper value)stat.error;stat.maxfloatnullablee_Gamma? Error on Gamma (lower value)stat.errorfloatnullableNH? Hygrogen column density1e+20cm**-2phys.columnDensityfloatnullableE_NH? Error on NH (upper value)1e+20cm**-2stat.error;stat.maxfloatnullablee_NH? Error on NH (lower value)1e+20cm**-2stat.errorfloatnullablen_NH[U] U for unconstrainedmeta.notecharNHGHygrogen Galactic column density (2)1e+20cm**-2phys.columnDensity;pos.galacticfloatOFluxObserved flux in 0.3-10keV band (3)fW.m**-2phot.flux;em.X-ray.mediumfloatE_OFlux? Error on OFlux (upper value) (3)fW.m**-2stat.error;stat.maxfloatnullablee_OFlux? Error on OFlux (lower value) (3)fW.m**-2stat.errorfloatnullablen_OFlux[a] Note on OFlux (4)meta.notecharUFlux? Unabsorbed flux in 0.3-10keV band (3)fW.m**-2phot.flux;em.X-ray.mediumfloatnullableC-stat? C-statisticstat.fit.paramfloatnullableDOF? Degree of freedomstat.fit.dofintnullableNctTotal number of source countsctphot.count;em.X-rayintDist? Distance from XRT position (5)arcsecpos;arith.difffloatnullableBmag? USNO-B magnitude (6)magphot.mag;em.opt.BfloatnullableVmag? NOMAD V magnitude (6)magphot.mag;em.opt.Vfloatnullablen_Vmag[a] a when Vmag from LSPM catalogue, see Appendix A2meta.notecharRmag? USNO R magnitude (6)magphot.mag;em.opt.RfloatnullableImag? I magnitude (6)magphot.mag;em.opt.IfloatnullableJmag? USNO 2MASS J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag? rms uncertainty on Jmagmagstat.error;phot.mag;em.IR.JfloatnullableHmag? 2MASS H magnitudemagphot.mag;em.IR.Hfloatnullablee_Hmag? rms uncertainty on Hmagmagstat.error;phot.mag;em.IR.HfloatnullableKmag? 2MASS K magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag? rms uncertainty on Kmagmagstat.error;phot.mag;em.IR.KfloatnullablepmRA? Proper motion along RA (7)mas/yrpos.pm;pos.eq.raintnullablee_pmRA? rms uncertainty on pmRAmas/yrstat.error;pos.pm;pos.eq.raintnullablepmDE? Proper motion along DE (7)mas/yrpos.pm;pos.eq.decintnullablee_pmDE? rms uncertainty on pmDEmas/yrstat.error;pos.pm;pos.eq.decintnullablelogFX/FR? X-ray to radio flux ratiophot.flux;arith.ratiofloatnullableComComments (catalogued name (VizieR) and ID)meta.notecharRAJ2000XMM right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000XMM right ascension in decimal degrees (J2000)degpos.eq.dec;meta.mainJ/MNRAS/412/1853/table3Possible ROSAT associations, displaying agreement within the 3{sigma} positional uncertaintiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXMMSL1XMMSL1 source name (JHHMMSS.s+DDMMSS)meta.id;meta.maincharROSATROSAT namemeta.idcharn_ROSAT[*] ROSAT represents a XMM Slew namemeta.notecharePos3ROSAT position errorarcsecstat.error;posintePos2? XRT position errorarcsecstat.error;posfloatnullabledPosPosition differencearcsecpos;arith.difffloatComCommentsmeta.notecharJ/MNRAS/412/1853/table6*UVOT photometry (observed magnitudes from a sum of all images)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXMMSL1XMMSL1 source name (JHHMMSS.s+DDMMSS)meta.id;meta.maincharTexpExposure timekstime.duration;obs.exposurefloatAB? Galactic extinction expected in B band (1)magphys.absorption.galfloatnullablebmag? UVOT B ({lambda}4392{AA}) magnitudemagphot.mag;em.opt.Bfloatnullablee_bmag? rms uncertainty on bmagmagstat.error;phot.mag;em.opt.Bfloatnullableuvw1mag? UVOT UVW1 ({lambda}2600{AA}) magnitudemagphot.mag;em.UVfloatnullablee_uvw1mag? rms uncertainty on uvw1magmagstat.error;phot.magfloatnullableuvm2mag? UVOT UVM2 ({lambda}2246{AA}) magnitudemagphot.mag;em.UVfloatnullablee_uvm2mag? rms uncertainty on uvm2magmagstat.error;phot.magfloatnullableuvw2mag? UVOT UVW2 ({lambda}1928{AA}) magnitudemagphot.mag;em.UVfloatnullablee_uvw2mag? rms uncertainty on uvw2magmagstat.error;phot.magfloatnullableRAJ2000Right ascension in decimal degrees (J2000)degpos.eq.ra;meta.mainDEJ2000Declination in decimal degrees (J2000)degpos.eq.dec;meta.mainePosError in position (90% confidence level)arcsecstat.error;stat.fit.param;phys.atmol.levelfloatDistDistance from XRTarcsecpos;arith.difffloatJ/MNRAS/412/1853/table8Summary of proposed classifications for individual sources, and/or any associated catalogued sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXMMSL1XMMSL1 source name (JHHMMSS.s+DDMMSS)meta.id;meta.maincharIdentProposed identificationsrc.classcharANamesAssociated catalogued sourcesmeta.id.crosschar