Publications (73)
High-resolution X-ray imaging and spectroscopy of the core of NGC 4945 with XMM-Newton and Chandra
N. J. Schurch, T. P. Roberts, R. S. Warwick
A 78 Day X-ray Period Detected from NGC 5907 ULX1 by Swift
D. J. Walton, F. Fuerst, M. Bachetti +12
M74 X-1 (CXOU J013651.1+154547): An Extremely Variable Ultraluminous X-Ray Source
M. I. Krauss, R. E. Kilgard, M. R. Garcia +2
ULX behaviour: the ultraluminous state, winds & interesting anomalies
T. P. Roberts, M. J. Middleton, A. D. Sutton +3
Challenging times: a re-analysis of NGC 5408 X-1
M. J. Middleton, T. P. Roberts, C. Done +1
Low metallicity natal environments and black hole masses in Ultraluminous X-ray Sources
L. Zampieri, T. P. Roberts
X-ray Outflows and Super-Eddington Accretion in the Ultraluminous X-ray Source Holmberg IX X-1
D. J. Walton, J. M. Miller, F. A. Harrison +4
An XMM-Newton view of M101 - II. Global X-ray source properties
L. P. Jenkins, T. P. Roberts, R. S. Warwick +2
The ultraluminous X-ray source NGC 5643 ULX1: a large stellar mass black hole accreting at super-Eddington rates?
F. Pintore, L. Zampieri, A. D. Sutton +3
Near-infrared counterparts of ultraluminous X-ray sources
M. Heida, P. G. Jonker, M. A. P. Torres +7
The Orbital Period of the Wolf-Rayet Binary IC 10 X-1; Dynamic Evidence that the Compact Object is a Black Hole
A. H. Prestwich, R. Kilgard, P. A. Crowther +6
Chandra reveals a black-hole X-ray binary within the ultraluminous supernova remnant MF 16
T. P. Roberts, E. J. M. Colbert
From ultraluminous X-ray sources to ultraluminous supersoft sources: NGC 55 ULX, the missing link
C. Pinto, W. Alston, R. Soria +8
Ultra-Luminous X-ray Sources in Haro 11 and the Role of X-ray Binaries in Feedback in Lyman-alpha Emitting Galaxies
A. H. Prestwich, F. Jackson, P. Kaaret +4
The Ultraluminous State
J. C. Gladstone, T. P. Roberts, Chris Done
The XMM-Newton Serendipitous Survey V. Optical identification of the XMM-Newton Medium sensitivity Survey (XMS)
X. Barcons, F. J. Carrera, M. T. Ceballos +53
New Hubble Space Telescope imaging of the counterparts to six ultraluminous X-ray sources
T. P. Roberts, A. J. Levan, M. R. Goad
XMM-Newton EPIC observations of the ultraluminous X-ray source NGC 5204 X-1
T. P. Roberts, R. S. Warwick, M. J. Ward +2
A deficit of ultraluminous X-ray sources in luminous infrared galaxies
W. Luangtip, T. P. Roberts, S. Mineo +5
The powerful jet of an off-nuclear intermediate-mass black hole in the spiral galaxy NGC 2276
M. Mezcua, T. P. Roberts, A. P. Lobanov +1
Do LINER 2 galaxies harbour low-luminosity Active Galactic Nuclei?
T. P. Roberts, N. J. Schurch, R. S. Warwick
New insights into the X-ray properties of the nearby barred spiral galaxy NGC 1672
L. P. Jenkins, W. N. Brandt, E. J. M. Colbert +4
The optical counterpart of the ultra-luminous x-ray source NGC 5204 X-1
M. R. Goad, T. P. Roberts, C. Knigge +1
Lense-Thirring precession in ULXs as a possible means to constrain the neutron star equation-of-state
M. J. Middleton, P. C. Fragile, M. Bachetti +11
Discovery of multiple ultraluminous X-ray sources in the galaxy KUG 0214-057
M. G. Watson, T. P. Roberts, M. Akiyama +1
Ultra-Luminous X-Ray Sources in the Most Metal Poor Galaxies
A. H. Prestwich, M. Tsantaki, A. Zezas +5
An XMM-Newton view of M101 - III. Diffuse X-ray emission
R. S. Warwick, L. P. Jenkins, A. M. Read +2
Ultraluminous X-ray Sources forming in low metallicity natal environments
L. Zampieri, M. Colpi, M. Mapelli +2
Discovery of a red supergiant counterpart to RX~J004722.4-252051, a ULX in NGC 253
M. Heida, M. A. P. Torres, P. G. Jonker +6
A long hard-X-ray look at the dual active galactic nuclei of M51 with NuSTAR
M. Brightman, M. BalokoviÄ, M. Koss +14
The XMM-Newton SSC survey of the Galactic Plane
A. Nebot Gomez-Moran, C. Motch, X. Barcons +17
A Large Catalogue of Ultraluminous X-ray Source Candidates in Nearby Galaxies
D. J. Walton, J. C. Gladstone, T. P. Roberts +1
Spitzer IRAC observations of IR excess in Holmberg IX X-1: A circumbinary disk or a variable jet?
R. P. Dudik, C. T. Berghea, T. P. Roberts +4
A variable ultraluminous X-ray source in a globular cluster in NGC 4649
T. P. Roberts, G. Fabbiano, B. Luo +9
The nature of ultraluminous X-ray sources in nearby galaxies
T. P. Roberts, M. R. Goad, M. J. Ward +2
2XMM Ultraluminous X-Ray Source Candidates in Nearby Galaxies
D. J. Walton, T. P. Roberts, S. Mateos +1
Searching for propeller-phase ULXs in the XMM-Newton Serendipitous Source Catalogue
H. P. Earnshaw, T. P. Roberts, R. Sathyaprakash
The nature of the bright ULX X-2 in NGC3921: a Chandra position and HST candidate counterpart
P. G. Jonker, M. Heida, M. A. P. Torres +6
X-ray time lags and nonlinear variability in the ultraluminous X-ray sources NGC 5408 X-1 and NGC 6946 X-1
L. Hernández-GarcÃa, S. Vaughan, T. P. Roberts +1
The X-ray spectral evolution of the ultraluminous X-ray source Holmberg IX X-1
W. Luangtip, T. P. Roberts, C. Done
A new, clean catalogue of extragalactic non-nuclear X-ray sources in nearby galaxies
H. P. Earnshaw, T. P. Roberts, M. J. Middleton +2
(No) dynamical constraints on the mass of the black hole in two ULXs
T. P. Roberts, J. C. Gladstone, A. D. Goulding +4
XMM-Newton observations of the starburst merger galaxies NGC 3256 & NGC 3310
L. P. Jenkins, T. P. Roberts, M. J. Ward +1
The unusual supernova remnant surrounding the ultraluminous X-ray source IC 342 X-1
T. P. Roberts, M. R. Goad, M. J. Ward +1
VLT/FORS2 observations of four high-luminosity ULX candidates
M. Heida, P. G. Jonker, M. A. P. Torres +4
Keck/MOSFIRE spectroscopy of five ULX counterparts
M. Heida, P. G. Jonker, M. A. P. Torres +5
New insights into ultraluminous X-ray sources from deep XMM-Newton observations
T. P. Roberts, A. -M. Stobbart, M. R. Goad +4
The X-ray properties of the nearby LINER galaxy, NGC 4736
T. P. Roberts, R. S. Warwick, T. Ohashi
A ROSAT HRI survey of bright nearby galaxies
T. P. Roberts, R. S. Warwick
NuSTAR and XMM-Newton observations of the extreme ultraluminous X-ray source NGC 5907 ULX1: A Vanishing Act
D. J. Walton, F. A. Harrison, M. Bachetti +15
Chandra monitoring observations of the ultraluminous X-ray source NGC 5204 X-1
T. P. Roberts, R. E. Kilgard, R. S. Warwick +2
Comparing Spectral Models for ULXs with NGC 4517 ULX1
D. J. Walton, J. C. Gladstone, T. P. Roberts +4
Radio observations of extreme ULXs: revealing the most powerful ULX radio nebula ever or the jet of an intermediate-mass black hole?
M. Mezcua, T. P. Roberts, A. D. Sutton +1
Chandra Observations of the Collisional Ring Galaxy NGC 922
A. H. Prestwich, J. L. Galache. T. Linden, V. Kalogara +5
A Chandra observation of the interacting pair of galaxies NGC 4485/NGC 4490
T. P. Roberts, R. S. Warwick, M. J. Ward +1
The ultraluminous X-ray source population of NGC 4485/4490
J. C. Gladstone, T. P. Roberts
The identification of an optical counterpart to the super-Eddington X-ray source, NGC 5204 X-1
T. P. Roberts, M. R. Goad, M. J. Ward +4
An XMM-Newton view of M101: I. The luminous X-ray source population
L. P. Jenkins, T. P. Roberts, R. S. Warwick +2
Investigating the nuclear activity of barred spiral galaxies: the case of NGC 1672
L. P. Jenkins, W. N. Brandt, E. J. M. Colbert +7
XMM-Newton observations of the brightest Ultraluminous X-ray sources
A-M. Stobbart, T. P. Roberts, J. Wilms
The Hot Interstellar Medium of the Interacting Galaxy NGC 4490
A. J. Richings, G. Fabbiano, Junfeng Wang +1
A Systematic Search for Near-Infrared Counterparts of Nearby Ultraluminous X-ray sources (II)
K. M. López, M. Heida, P. G. Jonker +5
The XMM-Newton Serendipitous Survey. II. First results from the AXIS high galactic latitude medium sensitivity survey
X. Barcons, F. J. Carrera, M. G. Watson +25
X-ray observations of ultraluminous X-ray sources
T. P. Roberts
Chandra observations of five ultraluminous X-ray sources in nearby galaxies
T. P. Roberts, R. S. Warwick, M. J. Ward +1
Testing the Paradigm that Ultraluminous X-ray Sources as a Class Represent Accreting Intermediate-Mass Black Holes
C. T. Berghea, K. A. Weaver, E. J. M. Colbert +1
A Systematic Study of Variability in a Sample of Ultraluminous X-ray Sources
L. M. Heil, S. Vaughan, T. P. Roberts
A deep XMM-Newton observation of the ultraluminous X-ray source HoII X-1 : the case against a 1000 solar mass black hole
M. R. Goad, T. P. Roberts, J. N. Reeves +1
XMM-Newton observations of the interacting galaxy pairs NGC7771/0 and NGC2342/1
L. P. Jenkins, T. P. Roberts, M. J. Ward +1
XMM-Newton observations of NGC 253: Resolving the emission components in the disk and nuclear area
W. Pietsch, T. P. Roberts, M. J. Freyberg +11
The X-ray properties of the dwarf Magellanic-type galaxy NGC 55
A-M. Stobbart, T. P. Roberts, R. S. Warwick
A dipping black-hole X-ray binary candidate in NGC 55
A-M. Stobbart, T. P. Roberts, R. S. Warwick
On the nature of high X-ray luminosities in SDSS galaxies
F. E. Jackson, T. P. Roberts, D. M. Alexander +5