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- 8Accretion
- 8Ism: Jets And Outflows
- 7Accretion Discs
- 7Radio Continuum: Stars
- 7Stars: Neutron
- 23Sivakoff, Gregory Robert
- 11Altamirano, Diego
- 10Heinke, Craig O.
- 10Miller-Jones, James C. A.
- 8Russell, D. M.
- 7Fender, Rob P.
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2011-01-01
Zhang, Zhongli, Gilfanov, Marat, Voss, Rasmus, Sivakoff, Gregory Robert, Kraft, Ralph P., Brassington, Nicola J., Kundu, Arunav, Jordán, Andrés Jordán, Sarazin, Craig, L.
Aims. Based on the archival data from the Chandra observations of nearby galaxies, we study different sub populations of low-mass X-ray binaries (LMXBs) – dynamically formed systems in globular clusters (GCs) and in the nucleus of M 31 and (presumably primordial) X-ray binaries in the fields of...
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2011-01-01
Coriat, Mickael, Corbel, Stephane, Prat, L., Miller-Jones, James. C. A., Cseh, D., Tzioumis, A. K., Brocksopp, C., Rodriguez, Jerome, Fender, Rob P., Sivakoff, Gregory Robert
In recent years, much effort has been devoted to unravelling the connection between the accretion flow and the jets in accreting compact objects. In the present work, we report new constraints on these issues, through the long-term study of the radio and X-ray behaviour of the black hole...
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2012-01-01
Altamirano, Diego, Keek, L., Cumming, A., Sivakoff, Gregory Robert, Heinke, Craig O., Wijnands, Rudy, Degenaar, Nathalie, Homan, Jeroen, Pooley, David
We report on Chandra, Rossi X-ray Timing Explorer (RXTE), Swift/Burst Alert Telescope (BAT) and MAXI observations of an X-ray flare of ∼1 d and subsequent outburst of a transient X-ray source observed in 2011 October–November in the globular cluster Terzan 5. We show that the source is the same...
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2012-01-01
Miller-Jones, James. C. A., Sivakoff, Gregory Robert, Altamirano, Diego, Coriat, Mickael, Corbel, Stephane, Dhawan, Vasudha, Krimm, H. A., Remillard, Ronald Alan, Rupen, Michael. P., Russell, D. M., Fender, Rob P., Heinz, S., Körding, Elmar. G., Maitra, D., Markoff, Sera, Migliari, Simone, Sarazin, Craig. L., Tudose, Valeriu
We present an intensive radio and X-ray monitoring campaign on the 2009 outburst of the Galactic black hole candidate X-ray binary H1743−322. With the high angular resolution of the Very Long Baseline Array, we resolve the jet ejection event and measure the proper motions of the jet ejecta...
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2014-01-01
Curran, P. A., Coriat, Mickael, Miller-Jones, James C. A., Armstrong, R. P., Edwards, P. G., Sivakoff, Gregory Robert, Woudt, Patrick Alan, Altamirano, Diego, Belloni, Thomaso. M., Corbel, Stephane, Fender, Rob P., Körding, Elmar. G., Krimm, H. A., Markoff, Sera, Migliari, Simone, Russell, D. M., Stevens, J., Tzioumis, T.
Swift J1745−26 is an X-ray binary towards the Galactic Centre that was detected when it went into outburst in 2012 September. This source is thought to be one of a growing number of sources that display ‘failed outbursts’, in which the self-absorbed radio jets of the transient source are never...
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2014-01-01
Forestell, Lindsay M., Heinke, Craig O., Cohn, Haldan N., Lugger, P. M., Sivakoff, Gregory Robert, Bogdanov, Slavko, Cool, A. M., Anderson, J.
We combine new and archival Chandra observations of the globular cluster NGC 6752 to create a deeper X-ray source list, and study the faint radio millisecond pulsars (MSPs) of this cluster. We detect four of the five MSPs in NGC 6752, and present evidence for emission from the fifth. The X-rays...
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2014-01-01
Russell, Thomas D., Soria, Roberto, Miller-Jones, James C. A., Curran, P. A., Markoff, Sera, Russell, D. M., Sivakoff, Gregory Robert
We present the results of our quasi-simultaneous radio, submm, infrared, optical and X-ray study of the Galactic black hole candidate X-ray binary MAXI J1836−194 during its 2011 outburst. We consider the full multiwavelength spectral evolution of the outburst, investigating whether the evolution...
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Deep Chandra observations of the NGC 4472 globular cluster black hole XMMU 1229397+075333: short-term variability from the first globular cluster black hole binary
Download2015-01-01
Joseph, Tana D., Maccarone, Thomas J., Kraft, Ralph P., Sivakoff, Gregory Robert
In this paper, we discuss the luminosity modulations and spectral analysis results of the recent deep observations of XMMU 122939.7+075333, the first black hole discovered in a globular cluster. The source has been detected many times, typically with LX > 1039 erg s−1, but in a 2010 observation...
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Deep radio imaging of 47 Tuc identifies the peculiar X-ray source X9 as a new black hole candidate
Download2015-01-01
Miller-Jones, James C. A., Strader, Jay, Heinke, Craig O., Maccarone, Thomas J., van den Berg, Maureen, Knigge, C., Chomiuk, Laura, Noyola, Eva, Russell, Thomas D., Seth, Anil C., Sivakoff, Gregory Robert
We report the detection of steady radio emission from the known X-ray source X9 in the globular cluster 47 Tuc. With a double-peaked C IV emission line in its ultraviolet spectrum providing a clear signature of accretion, this source had been previously classified as a cataclysmic variable. In...
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2015-01-01
Curran, P. A., Miller-Jones, James C. A., Rushton, Anthony P., Pawar, Devraj D., Anderson, G. E., Altamirano, Diego, Krimm, H. A., Broderick, J. W., Belloni, Thomaso M., Fender, Rob P., Körding, E. G., Maitra, D., Markoff, Sera, Migliari, Simone, Rumsey, C., Rupen, Michael P., Russell, D. M., Russell, Thomas D., Sarazin, Craig L., Sivakoff, Gregory Robert, Soria, Roberto, Tetarenko, Alexandra Jean, Titterington, David, Tudose, Valeriu
XTE J1908+094 is an X-ray transient black hole candidate in the Galactic plane that was observed in outburst in 2002 and 2013. Here we present multifrequency radio and X-ray data, including radio polarimetry, spanning the entire period of the 2013 outburst. We find that the X-ray behaviour of XTE...