Search Results - "Roberts, P T"

Low-metallicity natal environments and black hole masses in ultraluminous X-ray sources by Zampieri, L., Roberts, T. P.

“…We review the available estimates of the masses of the compact object in ultraluminous X-ray sources (ULXs) and critically reconsider the stellar mass versus…”
Get full text

The discovery of weak coherent pulsations in the ultraluminous X-ray source NGC 1313 X-2 by Sathyaprakash, R, Roberts, T P, Walton, D J, Fuerst, F, Bachetti, M, Pinto, C, Alston, W N, Earnshaw, H P, Fabian, A C, Middleton, M J, Soria, R

“…ABSTRACT We report the detection of weak pulsations from the archetypal ultraluminous X-ray source (ULX) NGC 1313 X-2. Acceleration searches reveal sinusoidal…”
Get full text

The powerful jet of an off-nuclear intermediate-mass black hole in the spiral galaxy NGC 2276 by Mezcua, M., Roberts, T. P., Lobanov, A. P., Sutton, A. D.

“…Jet ejection by accreting black holes is a mass invariant mechanism unifying stellar and supermassive black holes (SMBHs) that should also apply for…”
Get full text

2XMM ultraluminous X-ray source candidates in nearby galaxies by Walton, D. J., Roberts, T. P., Mateos, S., Heard, V.

“…Ultraluminous X-ray sources (ULXs) are some of the most enigmatic X-ray bright sources known to date. It is generally accepted that they cannot host black…”
Get full text

The Lense–Thirring timing-accretion plane for ULXs by Middleton, M J, Fragile, P C, Ingram, A, Roberts, T P

“…ABSTRACT Identifying the compact object in ultraluminous X-ray sources (ULXs) has to date required detection of pulsations or a cyclotron resonance scattering…”
Get full text

Radio observations of extreme ULXs: revealing the most powerful ULX radio nebula ever or the jet of an intermediate-mass black hole? by Mezcua, M., Roberts, T. P., Sutton, A. D., Lobanov, A. P.

“…The most extreme ultraluminous X-ray sources (ULXs), with LX > 5 x 10... erg s..., are amongst the best candidates for hosting intermediate-mass black holes…”
Get full text

XMM-Newton observations of the brightest ultraluminous X-ray sources by Stobbart, A.-M., Roberts, T. P., Wilms, J.

“…We present an analysis of 13 of the best quality ultraluminous X-ray source (ULX) data sets available from XMM-Newton European Photon Imaging Camera (EPIC)…”
Get full text

Challenging times: a re-analysis of NGC 5408 X-1 by Middleton, M. J., Roberts, T. P., Done, C., Jackson, F. E.

“…The ultraluminous X-ray source, NGC 5408 X-1, is one of only three such objects to show a quasi-periodic oscillation (QPO) in its power spectrum. Previous…”
Get full text

A systematic study of variability in a sample of ultraluminous X-ray sources by Heil, L. M., Vaughan, S., Roberts, T. P.

“…We present results from a study of short-term variability in 19 archival observations by XMM–Newton of 16 ultraluminous X-ray sources (ULXs). Eight…”
Get full text

Evidence for a motor gamma-band network governing response interference by Gaetz, W., Liu, C., Zhu, H., Bloy, L., Roberts, T.P.L.

“…The gamma-band response is thought to represent a key neural signature of information processing in the human brain. These brain signals have been associated…”
Get full text

Discovery of a red supergiant counterpart to RX J004722.4–252051, a ULX in NGC 253 by Heida, M., Torres, M. A. P., Jonker, P. G., Servillat, M., Repetto, S., Roberts, T. P., Walton, D. J., Moon, D.-S., Harrison, F. A.

“…We present two epochs of near-infrared spectroscopy of the candidate red supergiant counterpart to RX J004722.4–252051, a ULX in NGC 253. We measure radial…”
Get full text

X-ray spectral variability in the ultraluminous X-ray source Holmberg IX X−1 by Vierdayanti, K., Done, C., Roberts, T. P., Mineshige, S.

“…We use XMM–Newton and Swift data to study a spectral variability in the ultraluminous X-ray source (ULX), Holmberg IX X−1. The source luminosity varies by a…”
Get full text

Discovery of a radio transient in M81 by Anderson, G E, Miller-Jones, J C A, Middleton, M J, Soria, R, Swartz, D A, Urquhart, R, Hurley-Walker, N, Hancock, P J, Fender, R P, Gandhi, P, Markoff, S, Roberts, T P

“…Abstract We report the discovery of a radio transient in the spiral galaxy M81. The transient was detected in early 2015 as part of a two-year survey of M81…”
Get full text

Elevated Mean Diffusivity in the Left Hemisphere Superior Longitudinal Fasciculus in Autism Spectrum Disorders Increases with More Profound Language Impairment by NAGAE, L. M, ZARNOW, D. M, BLASKEY, L, DELL, J, KHAN, S. Y, QASMIEH, S, LEVY, S. E, ROBERTS, T. P. L

“…Language impairments are observed in a subset of individuals with ASD. To examine microstructural brain white matter features associated with language ability…”
Get full text

The Orbital Period of the Wolf-Rayet Binary IC 10 X-1: Dynamic Evidence that the Compact Object Is a Black Hole by Prestwich, A. H, Kilgard, R, Crowther, P. A, Carpano, S, Pollock, A. M. T, Zezas, A, Saar, S. H, Roberts, T. P, Ward, M. J

“…IC 10 X-1 is a bright (Lx = 10 super(38) ergs s super(-1)) variable X-ray source in the Local Group starburst galaxy IC 10. The most plausible optical…”
Get full text

New Hubble Space Telescope imaging of the counterparts to six ultraluminous X-ray sources by Roberts, T. P., Levan, A. J., Goad, M. R.

“…We report the results of new Hubble Space Telescope imaging of the positions of six ultraluminous X-ray sources (ULXs). Using images in three Advanced Camera…”
Get full text

Recombinant Tissue Plasminogen Activator Increases Blood-Brain Barrier Disruption in Acute Ischemic Stroke: An MR Imaging Permeability Study by Kassner, A, Roberts, T.P.L, Moran, B, Silver, F.L, Mikulis, D.J

“…Although thrombolytic therapy (recombinant tissue plasminogen activator [rtPA]) represents an important step forward in acute ischemic stroke (AIS) management,…”
Get full text

Testing the Paradigm that Ultraluminous X-Ray Sources as a Class Represent Accreting Intermediate-Mass Black Holes by Berghea, C. T, Weaver, K. A, Colbert, E. J. M, Roberts, T. P

“…To test the idea that ultraluminous X-ray sources (ULXs) in external galaxies represent a class of accreting intermediate-mass black holes (IMBHs), we have…”
Get full text

Receptor modeling of near-roadway aerosol mass spectrometer data in Las Vegas, Nevada, with EPA PMF by Brown, S. G, Lee, T, Norris, G. A, Roberts, P. T, Collett Jr., J. L, Paatero, P, Worsnop, D. R

“…Ambient non-refractory PM1 aerosol particles were measured with an Aerodyne High Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-AMS) at an elementary…”
Get full text

Searching for propeller-phase ULXs in the XMM–Newton Serendipitous Source Catalogue by Earnshaw, H P, Roberts, T P, Sathyaprakash, R

“…Abstract We search for transient sources in a sample of ultraluminous X-ray sources (ULXs) from the 3XMM-DR4 release of the XMM–Newton Serendipitous Source…”
Get full text