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Skip to Search Results- 19Sivakoff, Gregory Robert
- 13Altamirano, Diego
- 12Heinke, Craig O.
- 8Miller-Jones, James C. A.
- 7Bahramian, Arash
- 7Russell, D. M.
- 16X-Rays: Binaries
- 7Accretion
- 7Stars: Neutron
- 6Accretion Discs
- 6Radio Continuum: Stars
- 4Ism: Jets And Outflows
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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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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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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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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...
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2015-01-01
Degenaar, Nathalie, Wijnands, Rudy, Bahramian, Arash, Sivakoff, Gregory Robert, Heinke, Craig O., Brown, E. F., Fridriksson, Joel K., Homan, Jeroen, Cackett, Edward M., Cumming, A., Miller, Jon M., Altamirano, Diego, Pooley, David
When neutron stars reside in transient X-ray binaries, their crustal layers become heated during accretion outbursts and subsequently cool in quiescence. Observing and modelling this thermal response has yielded valuable insight into the physics of neutron star crusts. However, one unresolved...
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2015-01-01
Russell, Thomas D., Miller-Jones, James C. A., Curran, P. A., Soria, Roberto, Altamirano, Diego, Corbel, Stéphane, Coriat, Mickael, Moin, A., Russell, D. M., Sivakoff, Gregory Robert, Slaven-Blair, T. J., Belloni, Thomaso M., Fender, Rob P., Heinz, S., Jonker, P. G., Krimm, H. A., Körding, Elmar G., Maitra, D., Markoff, Sera, Middleton, Matthew, Migliari, Simone, Remillard, Ronald Alan, Rupen, Michael P., Sarazin, Craig L., Tetarenko, Alexandra Jean, Torres, M. A. P., Tudose, Valeriu, Tzioumis, A. K.
MAXI J1836−194 is a Galactic black hole candidate X-ray binary that was discovered in 2011 when it went into outburst. In this paper, we present the full radio monitoring of this system during its ‘failed’ outburst, in which the source did not complete a full set of state changes, only...
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2016-01-01
Bahramian, Arash, Tetarenko, Alexandra Jean, Sivakoff, Gregory Robert, Tremou, Evangelia, Linares, Manuel, Tudor, Vlad, Miller-Jones, James C. A., Heinke, Craig O., Chomiuk, Laura, Strader, Jay, Altamirano, Diego, Degenaar, Nathalie, Maccarone, Thomas J., Patruno, A., Sanna, Andrea, Wijnands, Rudy
The paper “Disc-Jet Coupling in the Terzan 5 Neutron Star X-ray Binary EXO 1745−248” was published as Tetarenko et al. 2016, MNRAS, 460, 345–355. In Section 3.3 of the paper there is a minor error in equation (1). The correct equation is as follows, (logLR−logLR,c)=logξ+β(logLX−logLX,c). (1) The...
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Lord of the Rings - Return of the King: Swift-XRT observations of dust scattering rings around V404 Cygni
Download2016-01-01
Beardmore, A. P., Willingale, R., Kuulkers, E., Altamirano, Diego, Motta, S. E., Osborne, J. P., Page, Kim L., Sivakoff, Gregory Robert
On 2015 June 15, the black hole X-ray binary V404 Cygni went into outburst, exhibiting extreme X-ray variability which culminated in a final flare on June 26. Over the following days, the Swift-X-ray Telescope detected a series of bright rings, comprising five main components that expanded and...