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- 11Radio Continuum: Stars
- 10Accretion
- 9Accretion Discs
- 8Ism: Jets And Outflows
- 7Stars: Neutron
- 27Sivakoff, Gregory Robert
- 12Altamirano, Diego
- 12Miller-Jones, James C. A.
- 10Heinke, Craig O.
- 9Fender, Rob P.
- 9Russell, D. M.
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2017-01-01
Tetarenko, Alexandra Jean, Sivakoff, Gregory Robert, Miller-Jones, James C. A., Rosolowsky, E. W., Petitpas, G., Gurwell, M., Wouterloot, J., Fender, Rob P., Heinz, S., Maitra, D., Markoff, Sera B., Migliari, Simone, Rupen, Michael P., Rushton, Anthony P., Russell, D. M., Russell, Thomas D., Sarazin, Craig L.
We present simultaneous radio through sub-mm observations of the black hole X-ray binary (BHXB) V404 Cygni during the most active phase of its June 2015 outburst. Our 4 h long set of overlapping observations with the Very Large Array, the Sub-millimeter Array and the James Clerk Maxwell Telescope...
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2018-01-01
Tudor, Vlad, Miller-Jones, James C. A., Knigge, C., Maccarone, Thomas J., Tauris, T. M., Bahramian, Arash, Chomiuk, Laura, Heinke, Craig O., Sivakoff, Gregory Robert, Strader, Jay, Plotkin, Richard M., Soria, Roberto, Albrow, M. D., Anderson, G. E., van den Berg, Maureen, Bernardini, Federico, Bogdanov, Slavko, Britt, Christopher. T., Russell, D. M., Zurek, David R.
To confirm the nature of the donor star in the ultracompact X-ray binary candidate 47 Tuc X9, we obtained optical spectra (3000–10 000 Å) with the Hubble Space Telescope / Space Telescope Imaging Spectrograph. We find no strong emission or absorption features in the spectrum of X9. In particular,...
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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...
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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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2018-01-01
Tetarenko, Alexandra Jean, Freeman, P., Rosolowsky, E. W., Miller-Jones, James C. A., Sivakoff, Gregory Robert
We present Atacama Large Millimetre/Sub-Millimetre Array (ALMA) observations of IRAS 19132+1035, a candidate jet–interstellar medium (ISM) interaction zone near the black hole X-ray binary (BHXB) GRS 1915+105. With these ALMA observations (combining data from the 12 m array and the Atacama...
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2018-01-01
Shaw, A. W., Heinke, Craig O., Mukai, K., Sivakoff, Gregory Robert, Tomsick, John A., Rana, Vikram
The X-ray spectra of intermediate polars can be modelled to give a direct measurement of white dwarf mass. Here, we fit accretion column models to NuSTAR spectra of three intermediate polars; V709 Cas, NY Lup, and V1223 Sgr in order to determine their masses. From fits to 3–78 keV spectra, we...
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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
Coppejans, Deanne L., Körding, Elmar G., Miller-Jones, James C. A., Rupen, Michael P., Knigge, C., Sivakoff, Gregory Robert, Groot, Paul J.
Radio emission from non-magnetic cataclysmic variables (CVs, accreting white dwarfs) could allow detailed studies of outflows and possibly accretion flows in these nearby, numerous and non-relativistic compact accretors. Up to now, however, very few CVs have been detected in the radio. We have...
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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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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...