J/ApJ/716/L109ivo://CDS.VizieR/J/ApJ/716/L109doi:10.26093/cds/vizier.17169109CDSMiller-Jones J.C.A.Sivakoff G.R.Altamirano D.Tudose V.Migliari S.,Dhawan V.Fender R.P.Garrett M.A.Heinz S.Kording E.G.Krimm H.A.,Linares M.Maitra D.Markoff S.Paragi Z.Remillard R.A.Rupen M.P.,Rushton A.Russell D.M.Sarazin C.L.Spencer R.E.2012-07-13T14:05:38Z2012-06-21T12:43:03ZCDS support team

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

cds-question@unistra.frx-ray-binary-starsradio-continuum-emissionpulsarsThe 2009 November outburst of the neutron star X-ray binary Aquila X-1 (Aql X-1) was observed with unprecedented radio coverage and simultaneous pointed X-ray observations, tracing the radio emission around the full X-ray hysteresis loop of the outburst for the first time. We use these data to discuss the disk-jet coupling, finding the radio emission to be consistent with being triggered at state transitions, both from the hard to the soft spectral state and vice versa. Our data appear to confirm previous suggestions of radio quenching in the soft state above a threshold X-ray luminosity of ~10% of the Eddington luminosity. We also present the first detections of Aql X-1 with very long baseline interferometry, showing that any extended emission is relatively diffuse and consistent with steady jets rather than arising from discrete, compact knots. In all cases where multi-frequency data were available, the source radio spectrum is consistent with being flat or slightly inverted, suggesting that the internal shock mechanism that is believed to produce optically thin transient radio ejecta in black hole X-ray binaries is not active in Aql X-1.2010ApJ...716L.109Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/716/L109CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/chandra : The Chandra Archive Log (CXC, 1999-2012)B/xmm : XMM-Newton Observation Log (XMM-Newton Science Operation Center,V/134 : Atlas of Radio/X-ray associations (ARXA) (Flesch, 2010)IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)J/ApJS/186/378 : Hard X-ray survey from Swift-BAT 2004-2006 (Tueller+, 2010)J/A+A/472/705 : BeppoSAX WFC X-ray source catalogue (SAXWFC) (Verrecchia+,J/PAZh/32/508 : Hard X-ray Bursts by INTEGRAL in 2003-2004 (Chelovekov+, 2006)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/716/L109https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/716/L109http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/716/L109https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/716/L109https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/716/L109http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/716/L109GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap3.180513520130092e-24 5.5658981862942334e-24RadiodefaultJ/ApJ/716/L109/table1X-ray and radio observations of Aql X-1recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDateDate of observationtime.epochnullableMJD-X? Modified Julian date of RXTE Proportional Counter Array (PCA) observationdtime.epochdoublenullableSX? PCA flux in milliCrabmCrabphot.flux;em.X-rayfloatnullablee_SX? Uncertainty in PCAmCrabstat.errorfloatnullableXh? Hard color: 9.7-16keV/6-9.7keV count ratiophot.flux;arith.ratiofloatnullablee_Xh? Uncertainty in Hardstat.errorfloatnullableXs? Soft color: 3.5-6keV/2-3.5keV count ratiophot.flux;arith.ratiofloatnullablee_Xs? Uncertainty in Softstat.errorfloatnullableMJD-a? Modified Julian date of VLA observationdtime.epochdoublenullablel_S8.4aLimit flag on S8.4ameta.code.errorcharS8.4a? VLA 8.4GHz flux densitymJyphot.flux.density;em.radio.6-12GHzfloatnullablee_S8.4a? Uncertainty in S8.4amJystat.errorfloatnullablel_S4.8aLimit flag on S4.8meta.code.errorcharS4.8a? VLA 4.8GHz flux densitymJyphot.flux.density;em.radio.3-6GHzfloatnullablee_S4.8a? Uncertainty in S4.8mJystat.errorfloatnullableMJD-b? Modified Julian date of Very Long Baseline Array (VLBA) observationdtime.epochdoublenullablel_S8.4bLimit flag on S8.4bmeta.code.errorcharS8.4b? VLBA 8.4GHz flux densitymJyphot.flux.density;em.radio.6-12GHzfloatnullablee_S8.4b? Uncertainty in S8.4bmJystat.errorfloatnullableS5.0? European VLBI Network (EVN) 5.0GHz flux densitymJyphot.flux.density;em.radio.3-6GHzfloatnullablee_S5.0? Uncertainty in S5.0mJystat.errorfloatnullablef_S5.0[d] Flag on S5.0 (1)meta.codecharState[EIS/BS/IS ] X-ray state (2)meta.codechar