A Deep Radio Survey of Hard State and Quiescent Black Hole X-Ray Binaries

J CA Miller-Jones, P G Jonker, Thomas Maccarone, G Nelemans, D Calvelo

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We have conducted a deep radio survey of a sample of black hole X-ray binaries in the hard and quiescent states to determine whether any systems were sufficiently bright for astrometric follow-up with high-sensitivity very long baseline interferometric arrays. The one hard-state system, Swift J1753.5-0127, was detected at a level of 0.5 mJy beam-1. All 11 quiescent systems were not detected. In the three cases with the highest predicted quiescent radio brightnesses (GRO J0422+32, XTE J1118+480, and GRO J1655-40), the new capabilities of the Expanded Very Large Array were used to reach noise levels as low as 2.6 μJy beam-1. None of the three sources were detected to 3σ upper limits of 8.3, 7.8, and 14.2 μJy beam-1, respectively. These observations represent the most stringent constraints to date on quiescent radio emission from black hole X-ray binaries. The uncertainties in the source distances, quiescent X-ray luminosities at the times of the observations, and the power-law index of
Original languageEnglish
Pages (from-to)L18
JournalAstrophysical Journal Letters
StatePublished - Sep 2011


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