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Skip to Search Results- 16Sivakoff, Gregory Robert
- 8Miller-Jones, James C. A.
- 7Heinke, Craig O.
- 6Altamirano, Diego
- 6Russell, D. M.
- 5Fender, Rob P.
- 13X-Rays: Binaries
- 11Accretion
- 10Accretion Discs
- 8Ism: Jets And Outflows
- 8Radio Continuum: Stars
- 5Black Hole Physics
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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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2018-01-01
Sanna, Andrea, Bahramian, Arash, Bozzo, E., Heinke, Craig O., Wijnands, Rudy, Degenaar, Nathalie, Maccarone, T., Riggio, Alessandro, Di Salvo, Tiziana, Iaria, Rosario, Burgay, M., Possenti, Andrea, Ferrigno, C., Papitto, A., Sivakoff, Gregory Robert, D'Amico, Nicolo, Burderi, Luciano, Altamirano, Diego
We report the discovery of X-ray pulsations at 105.2 Hz (9.5 ms) from the transient X-ray binary IGR J16597–3704 using NuSTAR and Swift. The source was discovered by INTEGRAL in the globular cluster NGC 6256 at a distance of 9.1 kpc. The X-ray pulsations show a clear Doppler modulation that...
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2016-01-01
Coppejans, Deanne L., Körding, Elmar G., Miller-Jones, James. C. A., Rupen, Michael P., Sivakoff, Gregory Robert, Knigge, C., Groot, Paul J., Woudt, Patrick Alan, Waagen, Elizabeth O., Templeton, Matthew
We present 8–12 GHz radio light curves of five dwarf nova (DN) type cataclysmic variable stars (CVs) in outburst (RX And, U Gem, and Z Cam), or superoutburst (SU UMa and YZ Cnc), increasing the number of radio-detected DN by a factor of 2. The observed radio emission was variable on time-scales...
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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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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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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
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...