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Beuchert T., Middleton M.J., Soria R., Miller-Jones J.C.A., Dauser T., Roberts T.P., Sathyaprakash R., Markoff S., 2024, MNRAS, 534, 645-654
"Exploring the case for hard-X-ray beaming in NGC 6946 X-1"
[arXiv]
Imbrogno M., Motta S.E., Amato R., Israel G.L., Rodríguez Castillo G.A., Guillermo A., Brightman M., Casella P., Bachetti M., Fürst F., Stella L., Pinto C., Pintore F., Tombesi F., Gúrpide A., Middleton M.J., Salvaggio C., Tiengo A., Belfiore A., De Luca A., Esposito P., Wolter A., Earnshaw H.P., Walton D.J., Roberts T.P., Zampieri L., Marelli M., Salvaterra R., 2024, A&A, 689, 284 (14pp)
"Skipping a beat: discovery of persistent quasi-periodic oscillations associated with a pulsed fraction drop of the spin signal in M51 ULX-7"
[arXiv]
Luangtip W., Roberts T.P., 2024, MNRAS, 528, 418-431
"NGC 2403 XMM4: evidence for a super-Eddington neutron star with a possible transient pulsation"
[arXiv]
Barra F., Pinto C., Middleton M.J., Di Salvo T., Walton D.J., Gúrpide A., Roberts T.P., 2024, A&A, 682, A94 (16pp)
"On the nature of the ultraluminous X-ray source Holmberg II X-1"
[arXiv]
Bachetti M., Middleton M.J., Pinto C., Gúrpide A., Walton D.J., Brightman M., Lehmer B., Roberts T.P., Vasilopoulos G., Alford J., Amato R., Ambrosi E., Dai L., Earnshaw H.P., El Byad H., García J.A.. Israel G.L., Jaodand A., Madsen K., Maitra C., Mandel S., Mori K., Pintore F., Ohsuga K., Pilia M., Stern D., Younes G., Wolter A., 2023, Frontiers of Astronomy and Space Science, 10, id. 1289432 (17pp)
"The High Energy X-ray Probe (HEX-P): Studying Extreme Accretion with Ultraluminous X-ray Sources"
[arXiv]
Roberts T.P., Walton D.J., Mackenzie A.D.A., Heida M., Scaringi S., 2023, MNRAS, 525, 3330-3343
"Digging a little deeper: characterising three new extreme ULX candidates"
[arXiv]
West L., Garofali K., Lehmer B.D., Prestwich A., Eufrasio R., Luangtip W., Roberts T.P., Zezas A., 2023, ApJ, 952, 22 (12pp)
"The Large Deficit of HMXB Emission from Luminous Infrared Galaxies: the Case of the Circumnuclear Starburst Ring in NGC 7552"
[arXiv]
MacKenzie A.D.A., Roberts T.P., Walton D.J., 2023, AN, 344, article id easna.20230028 (6pp)
"The hyperluminous X-ray source population"
[pdf]
Khan N., Middleton M.J., Wiktorowicz G., Dauser T., Roberts T.P., Wilms J., 2023, MNRAS, 522, 5654-5654
"Correction to: The impact of precession on the observed population of ULXs"
[link to the MNRAS website]
Fürst F., Walton D.J., Israel G.L., Bachetti M., Barret D., Brightman M., Earnshaw H.P., Fabian A., Heida M., Imbrogno M., Middleton M.J., Pinto C., Salvaterra R., Roberts T.P., Rodríguez Castillo G.A., Webb, N., 2023, A&A, 672, 140 (10pp)
"Probing the nature of the low state in the extreme ultraluminous X-ray pulsar NGC 5907 ULX1"
[arXiv]
Barra F., Pinto C., Walton D.J., Kosec P., D'Aì A., Di Salvo T., Del Santo M., Earnshaw H., Fabian A.C., Fuerst F., Marino A., Pintore F., Robba A., Roberts T.P., 2022, MNRAS, 516, 3972-3983
"Unveiling the disc structure in ultraluminous X-ray source NGC 55 ULX-1"
[arXiv]
Robba A., Pinto C., Pintore F., Rodriguez G., Ambrosi E., Barra F., Cusumano G., D'Aì A., Del Santo M., Kosec P., Marino A., Middleton M., Roberts T., Salvaggio C., Soria R., Wolter A., Walton D., 2022, MNRAS, 515, 4669-4674
"A transient ultraluminous X-ray source in NGC 55 "
[arXiv]
Earnshaw, H.P., Brightman M., Harrison F.A., Heida M., Jaodand A., Middleton M.J., Roberts T.P., Walton D.J., 2022, ApJ, 934, 42, 10pp
"The variability behavior of NGC 925 ULX-3"
[arXiv]
Sathyaprakash R., Roberts T.P., Grisé F., Kaaret P., Ambrosi E., Done C., Gladstone J.C., Kajava J.J.E., Soria R., Zampieri L., 2022, MNRAS, 511, 5346-5362
"A multi-wavelength view of distinct accretion regimes in the pulsating ultraluminous X-ray source NGC 1313 X-2"
[arXiv]
Khan N., Middleton M.J., Wiktorowicz G., Dauser T., Roberts T.P., Wilms J., 2022, MNRAS, 509, 2493-2506
"The impact of precession on the observed population of ULXs"
[arXiv]
Walton D.J., Mackenzie A.D.A., Gully H., Patel N.R., Roberts T.P., Earnshaw H.P., Mateos S., 2022, MNRAS, 509, 1587-1604
"A multi-mission catalogue of Ultraluminous X-ray Source candidates"
[arXiv]
D'Aì A., Pinto C., Del Santo M., Pintore F., Soria R., Robba A., Ambrosi E., Alston W., Barret D., Fabian A.C., Fürst F., Kara E., Kosec P., Middleton M., Roberts T., Rodriguez-Castillo G., Walton D.J., 2021, MNRAS, 507, 5567-5579
"The chameleon on the branches: spectral state transition and dips in NGC 247 ULX-1 "
[arXiv]
Pinto C., Soria R., Walton D.J., D'Aì A., Pintore F., Kosec P., Alston W.N., Fürst F., Middleton M.J., Roberts T.P., Del Santo M., Barret D., Ambrosi E., Robba A., Earnshaw H., Fabian A.C., 2021, MNRAS, 505, 5058-5074
"XMM-Newton campaign on the ultraluminous X-ray source NGC 247 ULX-1: outflows"
[arXiv]
Alston W.N., Pinto C., Barret D., D'Aì A., Del Santo M., Earnshaw H., Fabian A.C., Fürst F., Kara E., Kosec P., Middleton M.J., Parker M.L., Pintore F., Robba A., Roberts T.P., Sathyaprakash R., Walton D., Ambrosi E., 2021, MNRAS, 505, 3722-3729
"Quasi-periodic dipping in the ultraluminous X-ray source, NGC 247 ULX-1 "
[arXiv]
Robba A., Pinto C., Walton D.J., Soria R., Kosec P., Pintore F., Roberts T.P., Alston W.N., Middleton M., Cusumano G., Earnshaw H.P., Fürst F., Sathyaprakash R., Kyritsis E., Fabian A.C., 2021, A&A, 652, 118 (16pp)
"Broadband X-ray spectral variability of the pulsing ULX NGC 1313 X-2"
[arXiv]
Fürst F., Walton D.J., Heida M., Bachetti M., Pinto C., Middleton M.J., Brightman M., Earnshaw H.P., Barret D., Fabian A.C., Kretschmar P., Pottschmidt K., Ptak A., Roberts T., Stern D., Webb N., Wilms J., 2021, A&A, 651, 75 (10pp)
"Long-term pulse period evolution of the ultra-luminous X-ray pulsar NGC 7793 P13"
[arXiv]
Walton D.J., Heida M., Bachetti M., Fürst F., Brightman M., Earnshaw H., Evans P.A., Fabian A.C., Grefenstette B.W., Harrison F.A., Israel G.L., Lansbury G.B., Middleton M.J., Pike S., Rana V., Roberts T.P., Rodriguez Castillo G.A., Salvaterra R., Song X., Stern D., 2021, MNRAS, 501, 1002-1012
"A new transient ultraluminous X-ray source in NGC 7090"
[arXiv]
López K.M., Heida M., Jonker P.G., Torres M.A.P., Roberts T.P., Walton D.J., Moon D.-S., Harrison F.A., 2020, MNRAS, 497, 917-932
"NIR counterparts to ULXs (III): completing the photometric survey and selected spectroscopic results "
[arXiv]
Walton D.J., Pinto C., Nowak M., Bachetti M., Sathyaprakash R., Kara E., Roberts T.P., Soria R., Brightman M., Canizares C.R., Earnshaw H.P., Fürst F., Heida M., Middleton M.J., Stern D., Tao L., Webb N., Alston W.N., Barret D., Fabian A.C., Harrison F.A., Kosec P., 2020, MNRAS, 494, 6012-6029
"The unusual broad-band X-ray spectral variability of NGC 1313 X-1 seen with XMM-Newton, Chandra, and NuSTAR"
[arXiv]
Rodríguez Castillo G.A., Israel G.L., Belfiore A., Bernardini F., Esposito P., Pintore F., De Luca A., Papitto A., Stella L., Tiengo A., Zampieri L., Bachetti M., Brightman M., Casella P., D'Agostino D., Dall'Osso S., Earnshaw H.P., Fürst F., Haberl F., Harrison F.A., Mapelli M., Marelli M., Middleton M., Pinto C., Roberts T.P., Salvaterra R., Turolla R., Walton D.J., Wolter, A., 2020, ApJ, 895, 60 (14pp)
"Discovery of a 2.8 s Pulsar in a 2 Day Orbit High-mass X-Ray Binary Powering the Ultraluminous X-Ray Source ULX-7 in M51"
[arXiv]
Earnshaw H.P., Heida M., Brightman M., Fürst F., Harrison F.A., Jaodand A., Middleton M.J., Roberts T.P., Sathyaprakash R., Stern D., Walton D.J., 2020, ApJ, 891, 153 (7pp)
"The (re)appearance of NGC 925 ULX-3, a new transient ULX"
[arXiv]
Pintore F., Marelli M., Salvaterra R., Israel G.L., Rodríguez Castillo G.A., Esposito P., Belfiore A., De Luca A., Wolter A., Mereghetti S., Stella L., Rigoselli M., Earnshaw H.P., Pinto C., Roberts T.P., Walton D.J., Bernardini F., Haberl F., Salvaggio C., Tiengo A., Zampieri L., Bachetti M., Brightman M., Casella P., D'Agostino D., Dall'Osso S., Fürst F., Harrison F.A., Mapelli M., Papitto A., Middleton M., 2020, ApJ, 890, 166 (11pp)
"The Ultraluminous X-ray sources population of the galaxy NGC 7456"
[arXiv]
Pinto C., Walton D.J., Kara E., Parker M.L., Soria R., Kosec P., Middleton M.J., Alston W.N., Fabian A.C., Guainazzi M., Roberts T.P., Fürst F., Earnshaw H.P., Sathyaprakash R., Barret D., 2020, MNRAS, 492, 4646-4665
"XMM-Newton campaign on ultraluminous X-ray source NGC 1313 X-1: wind versus state variability"
[arXiv]
Pinto C., Mehdipour M., Walton D.J., Middleton M.J., Roberts T.P., Fabian A.C., Guainazzi M., Soria R., Kosec P., Ness J.-U., 2020, MNRAS, 491, 5702-5716
"Thermal stability of winds driven by radiation pressure in super-Eddington accretion discs"
[arXiv]
Kara E., Pinto C., Walton D.J., Alston W.N., Bachetti M., Barret D., Brightman M., Canizares C.R., Earnshaw H.P., Fabian A.C., Fürst F., Kosec P., Middleton M.J., Roberts T.P., Soria R., Tao L., Webb N.A., 2020, MNRAS, 491, 5172-5178
"Discovery of a soft X-ray lag in the Ultraluminous X-ray Source NGC 1313 X-1"
[arXiv]
Song X., Walton D.J., Lansbury G.B., Evans P.A., Fabian A.C., Earnshaw H., Roberts T.P., 2020, MNRAS, 491, 1260-1277
"The Hunt for Pulsating Ultraluminous X-ray Sources"
[arXiv]
López K.M., Jonker P.G., Heida M., Torres M.A.P., Roberts T.P., Walton D.J., Moon D.-S., Harrison F.A., 2019, MNRAS, 489, 1249-1264
"Discovery and analysis of a ULX nebula in NGC 3521"
[arXiv]
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., 2019, MNRAS, 489, 1181-1196
"Discovery of a radio transient in M81"
[arXiv]
Middleton M., Fragile P.C., Ingram A., Roberts T.P., 2019, MNRAS, 489, 282-296
"The Lense-Thirring timing-accretion plane for ULXs"
[arXiv]
Sathyaprakash R., Roberts T.P., Siwek M., 2019, MNRAS, 488, 4614-4622
"Observational limits on the X-ray emission from the bubble nebula surrounding Ho IX X-1"
[arXiv]
Sathyaprakash R., Roberts T.P., Walton D.J., Fürst F., Bachetti M., Pinto C., Alston W.N., Earnshaw H.P., Fabian A.C., Middleton M.J., Soria R., 2019, MNRAS, 488, L35-L40
"The discovery of weak coherent pulsations in the ultraluminous X-ray source NGC 1313 X-2"
[arXiv]
Earnshaw H.P., Roberts T.P., Middleton M.J., Walton D.J., Mateos S., 2019, MNRAS, 483, 5554-5573
"A new, clean catalogue of extragalactic non-nuclear X-ray sources in nearby galaxies"
[arXiv]
Brightman M., Balokovic M., Koss M., Alexander D.M., Annuar A., Earnshaw H., Gandhi P., Harrison F.A., Hornschemeier A.E., Lehmer B., Powell M.C., Ptak A., Rangelov B., Roberts T.P., Stern D., Walton D.J., Zezas A., 2018, ApJ, 867, 110 (17pp)
"A long hard-X-ray look at the dual active galactic nuclei of M51 with NuSTAR"
[arXiv]
Earnshaw H.P., Roberts T.P., Sathyaprakash R., 2018, MNRAS, 476, 4272-4277
"Searching for propeller-phase ULXs in the XMM-Newton Serendipitous Source Catalogue"
[arXiv]
Middleton M.J., Fragile P.C., Bachetti M., Brightman M., Jiang Y-F., Ho W.G.C., Roberts T.P., Ingram A.R., Dauser T., Pinto C., Walton D.J., Fürst F., Fabian A.C., Gehrels N., 2018, MNRAS, 475, 154
"Lense-Thirring precession in ULXs as a possible means to constrain the neutron star equation-of-state"
[arXiv]
Kaaret P., Feng H., Roberts T.P., 2017, ARA&A, 55, 303-341
"Ultraluminous X-ray sources"
[arXiv]
López K.M., Heida M., Jonker P.G., Torres M.A.P., Roberts T.P., Walton D.J., Moon D.-S., Harrison F.A., 2017, MNRAS, 469, 671-682
"A Systematic Search for Near-Infrared Counterparts of Nearby Ultraluminous X-ray sources (II)"
[arXiv]
Siwek M., Sadowski A., Narayan R., Roberts T.P., Soria R., 2017, MNRAS, 470, 361-371
"Optical and X-ray luminosity of expanding nebulae around ultraluminous X-ray sources"
[arXiv]
Pinto C., Alston W., Soria R., Middleton M.J., Walton D.J., Sutton A.D., Fabian A.C., Earnshaw H., Urquhart R., Kara E., Roberts T.P., 2017, MNRAS, 468, 2865-2883
"From ultraluminous X-ray sources to ultraluminous supersoft sources: NGC 55 ULX, the missing link"
[arXiv]
Earnshaw H.M., Roberts T.P., 2017, MNRAS, 467, 2690-2705
"Soft Extragalactic X-Ray Binaries at the Eddington Threshold"
[arXiv]
Sutton A.D., Swartz D.A., Roberts T.P., Middleton M.J., Soria R., Done C., 2017, ApJ, 836, 48 (19pp)
"Crossing the Eddington limit: examining disk spectra at high accretion rates"
[arXiv]
Dudik R.P., Berghea C.T., Roberts T.P., Grise F., Singh A., Pagano R., Winter L.M., 2016, ApJ, 831, 88 (7pp)
"Spitzer IRAC observations of an IR excess in Holmberg IX X-1: a circumbinary disc or a variable jet?"
[arXiv]
Walton D.J., Fürst F., Bachetti M., Barret D., Brightman M., Fabian A.C., Gehrels N., Harrison F.A., Heida M., Middleton M.J., Rana V., Roberts T.P., Stern D., Tao L., Webb N., 2016, ApJL, 827, L13 (6pp)
"A 78 Day X-Ray Period Detected from NGC 5907 ULX1 by Swift"
[arXiv]
Luangtip W., Roberts T.P., Done C., 2016, MNRAS, 460, 4417-4432
"The X-ray spectral evolution of the ultraluminous X-ray source Holmberg IX X-1"
[arXiv]
Roberts T.P., Middleton M.J., Sutton A.D., Mezcua M., Walton D.J., Heil L.M., 2016, AN, 337, 534-540
"ULX behaviour: the ultraluminous state, winds & interesting anomalies"
[arXiv]
Heida M., Jonker P.G., Torres M.A.P., Roberts T.P., Walton D.J., Moon D.-S., Stern D., Harrison F.A., 2016, MNRAS, 459, 771-778
"Keck/MOSFIRE spectroscopy of five ULX counterparts"
[arXiv]
Pintore F., Zampieri L., Sutton A.D., Roberts T.P., Middleton M.J., Gladstone J.C., 2016, MNRAS, 459, 455-466
"The ultraluminous X-ray source NGC 5643 ULX1: a large stellar mass black hole accreting at super-Eddington rates?"
[arXiv]
Earnshaw H.M., Roberts T.P., Heil L.M., Mezcua M., Walton D.J., Done C., Harrison F.A., Lansbury G.B., Middleton M.J., Sutton A.D., 2016, MNRAS, 456, 3840-3854
"A variable ULX and possible IMBH candidate in M51a"
[arXiv]
Sutton A.D., Roberts T.P., Middleton M.J., 2015, ApJ, 814, 73 (9pp)
"X-ray spectral residuals in NGC 5408 X-1: diffuse emission from star formation, or the signature of a super-Eddington wind?"
[arXiv]
Middleton M.J., Walton D.J., Fabian A., Roberts T.P., Heil L., Pinto C., Anderson G., Sutton A., 2015, MNRAS, 454, 3134-3142
"Diagnosing the accretion flow in ultraluminous X-ray sources using soft X-ray atomic features"
[arXiv]
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., 2015, MNRAS, 453, 3510-3518
"Discovery of a red supergiant counterpart to RX~J004722.4-252051, a ULX in NGC 253"
[arXiv]
Hernández-García L., Vaughan S., Roberts T.P., Middleton M., 2015, MNRAS, 453, 2877-2884
"X-ray time lags and nonlinear variability in the ultraluminous X-ray sources NGC 5408 X-1 and NGC 6946 X-1"
[arXiv]
Prestwich A.H., Jackson F., Kaaret P., Brorby M., Roberts T.P., Saar S.H., Yukita M., 2015, ApJ, 812, 166 (7pp)
"Ultra-Luminous X-ray Sources in Haro 11 and the Role of X-ray Binaries in Feedback in Lyman-alpha Emitting Galaxies"
[arXiv]
Sutton, A.D., Roberts T.P., Gladstone J.C., Walton D.J., 2015, MNRAS, 450, 787-793
"The hyperluminous X-ray source candidate in IC4320: another HLX bites the dust"
[arXiv]
Mezcua M., Roberts T.P., Lobanov A.P., Sutton A.D., 2015, MNRAS, 448, 1893-1899
"The powerful jet of an off-nuclear intermediate-mass black hole in the spiral galaxy NGC 2276"
[arXiv]
Middleton M.J., Heil L.M., Pintore F., Walton D.J., Roberts T.P., 2015, MNRAS, 447, 3243-3263
"A spectral-timing model for ULXs in the super-critical regime"
[arXiv]
Walton D.J., Harrison F.A., Bachetti M., Barret D., Boggs S.E., Christensen F.E., Craig W.W., Fürst F., Grefenstette B.W., Hailey C.J., Madsen K.K., Middleton M.J., Rana V., Roberts T.P., Stern D., Sutton A.D., Webb N., Zhang W., 2015, ApJ, 799, 122 (7pp)
"NuSTAR and XMM-Newton observations of the extreme ultraluminous X-ray source NGC 5907 ULX1: A Vanishing Act"
[arXiv]
Luangtip W., Roberts T.P., Mineo S., Lehmer B.D., Alexander D.M., Jackson F.E., Goulding A.D., Fischer J.L., 2015, MNRAS, 446, 470-492
"A deficit of ultraluminous X-ray sources in luminous infrared galaxies"
[arXiv]
Sutton A.D., Done C., Roberts T.P., 2014, MNRAS, 444, 2415-2427
"Irradiated, colour-temperature-corrected accretion discs in ultraluminous X-ray sources"
[arXiv]
Heida M., Jonker P.G., Torres M.A.P., Kool E., Servillat M., Roberts T.P., Groot P.J., Walton D.J., Moon D., Harrison F.A., 2014, MNRAS, 442, 1054-1067
"Near-infrared counterparts of ultraluminous X-ray sources"
[arXiv]
Middleton M.J., Walton D.J., Roberts T.P., Heil L., 2014, MNRAS, 438, L51-55
"Broad absorption features in wind-dominated ULXs?"
[arXiv]
Mezcua M., Roberts T.P., Sutton A.D., Lobanov A.P., 2013, MNRAS, 436, 3128-3134
"Radio observations of extreme ULXs: revealing the most powerful ULX radio nebula ever or the jet of an intermediate-mass black hole?"
[arXiv]
Sutton A.D., Roberts T.P., Middleton M.J., 2013, MNRAS, 435, 1758-1775
"The ultraluminous state revisited: fractional variability and spectral shape as diagnostics of super-Eddington accretion"
[arXiv]
Sutton A.D., Roberts T.P., Gladstone J.C., Farrell S.A., Reilly E., Goad M.R., Gehrels N., 2013, MNRAS, 434, 1702-1712
"A bright ultraluminous X-ray source in NGC 5907"
[arXiv]
Walton D.J., Miller J.M., Harrison F.A., Fabian A.C., Roberts T.P., Middleton M.J., Reis R.C., 2013, ApJL, 773, L9 (5pp)
"X-ray Outflows and Super-Eddington Accretion in the Ultraluminous X-ray Source Holmberg IX X-1"
[arXiv]
Heida M., Jonker P.G., Torres M.A.P., Roberts T.P., Miniutti G., Fabian A.C., Ratti E., 2013, MNRAS, 433, 681-687
"VLT/FORS2 observations of four high-luminosity ULX candidates"
[arXiv]
Gladstone J.C., Copperwheat C., Heinke C.O., Roberts T.P., Cartwright T.F., Levan A.J., Goad M.R., 2013, ApJS, 206, 14 (38pp)
"Optical counterparts of the nearest ultraluminous X-ray sources"
[arXiv]
Prestwich A.H., Tsantaki M., Zezas A., Jackson F.E., Roberts T.P., Foltz R., Linden T., Kalogera V., 2013, ApJ, 769, 92 (9pp)
"Ultra-Luminous X-Ray Sources in the Most Metal Poor Galaxies"
[arXiv]
Nebot Gomez-Moran A., Motch C., Barcons X., Carrera F.J., Ceballos M.T., Cropper M., Grosso N., Guillout P., Herent O., Mateos S., Michel L., Osborne J.P., Pakull M., Pineau F.-X., Pye J.P., Roberts T.P., Rosen S.R., Schwope A.D., Watson M.G., Webb N., 2013, A&A, 553, 12 (21pp)
"The XMM-Newton SSC survey of the Galactic Plane"
[arXiv]
Middleton M.J., Miller-Jones J.C.A., Markoff S., Fender R., Henze
M., Hurley-Walker N., Scaife A.M.M., Roberts T.P., Walton D.,
Carpenter J., Macquart J.-P., Bower G.C., Gurwell M., Pietsch W.,
Haberl F., Harris J., Daniel M., Miah J., Done C., Morgan J.,
Dickinson H., Charles P., Burwitz V., Della Valle M., Freyberg M.,
Greiner J., Hernanz M., Hartmann D.H., Hatzidimitriou D., Riffeser A.,
Sala G., Seitz S., Reig P., Rau A., Orio M., Titterington D., Grainge
K., 2013, Nature, 493, 187-190
"Bright radio emission from an ultraluminous
stellar-mass microquasar in M31"
[arXiv]
Roberts T.P., Fabbiano G., Luo B., Kim D.-W., Strader J., Middleton M.J., Brodie J.P., Fragos T., Gallagher J.S., Kalogera V., King A.R., Zezas A., 2012, ApJ, 760, 135 (7pp)
"A variable ultraluminous X-ray source in a globular cluster in NGC 4649"
[arXiv]
Jonker P.G., Heida M., Torres M.A.P., Miller-Jones J.C.A., Fabian A.C., Ratti E.M., Miniutti G., Walton D.J., Roberts T.P., 2012, ApJ, 758, 28 (8pp)
"The nature of the bright ULX X-2 in NGC3921: a Chandra position and HST candidate counterpart"
[arXiv]
Gruyters P., Exter K., Roberts T.P., Rappaport S., 2012, A&A, 544, 86 (13pp)
"A VLT VIMOS IFU study of the ionisation nebula surrounding the
supersoft X-ray source CAL 83"
[arXiv]
Sutton A.D., Roberts T.P., Walton D.J., Gladstone J.C., Scott A.E., 2012, MNRAS, 423, 1154-1177
"The most extreme ultraluminous X-ray sources: evidence for intermediate-mass black holes?"
[arXiv]
Jackson F.E., Roberts T.P., Alexander D.M., Gelbord J.M.,
Goulding A.D., Ward M.J., Wardlow J.L., Watson M.G., 2012, MNRAS,
422, 2-13
"On the nature of
high X-ray luminosities in SDSS galaxies"
[arXiv]
Middleton M.J., Sutton A.D., Roberts T.P., Jackson F.E.,
Done C., 2012, MNRAS, 420, 2969-2977
"The missing link: a low mass X-ray binary in M31 seen
as an ultraluminous X-ray source"
[arXiv]
Prestwich A.H., Galache J.L., Linden T., Kalogera V., Zezas A.,
Roberts T.P., Kilgard R., Trinchieri G., Wolter A., 2012, ApJ,
747, 150 (6pp)
"Chandra observations
of the collisional ring galaxy NGC 922"
[arXiv]
Rasmussen J., Bai X.-N., Mulchaey J.S., van Gorkom J.H., Jeltema
T.E., Zabludoff A.I., Wilcots E., Martini P., Lee D., Roberts
T.P., 2012, ApJ, 747, 31 (14pp)
"Hot and cold galactic gas in the NGC 2563 galaxy
group"
[arXiv]
Middleton M.J., Cackett E.M., Shaw C., Ramsay G., Roberts
T.P., Wheatley P.J., 2012, MNRAS, 419, 336-341
"Identifying a new intermediate-polar using XMM-Newton
and INTEGRAL"
[arXiv]
Middleton M.J., Sutton A.D., Roberts T.P., 2011, MNRAS, 417, 464-471
"X-ray spectral evolution in the
ultraluminous X-ray source M33 X-8"
[arXiv]
Walton D.J., Roberts T.P., Mateos S., Heard V., 2011, MNRAS,
416, 1844-1861
"2XMM Ultraluminous
X-Ray Source Candidates in Nearby Galaxies"
[arXiv]
Walton D.J., Gladstone J.C., Roberts T.P., Fabian A.C.,
Caballero-Garcia M.D., Done C., Middleton M.J., 2011, MNRAS, 414,
1011-1022
"Comparing spectral models
for ULXs with NGC 4517 ULX1"
[arXiv]
Jenkins L.P., Brandt W.N., Colbert E.J.M., Koribalski B., Kuntz
K.D., Levan A.J., Ohja R., Roberts T.P., Ward M.J., Zezas A.,
2011, ApJ, 734, 33 (20pp)
"Investigating the nuclear activity of barred spiral
galaxies: the case of NGC 1672"
[arXiv]
Roberts T.P., Gladstone J.C., Goulding A.D., Swinbank A.M.,
Ward M.J., Goad M.R., Levan A.J., 2011, AN, 332, 398-401
"(No) dynamical constraints on the mass of
the black hole in two ULXs"
[arXiv]
Middleton M., Roberts T.P., Done C., Jackson F., 2011, AN,
388-391
"Does NGC 5408 X-1 really
contain an IMBH?"
Russell D.M., Yang Y.-J., Gladstone J.C., Wiersema K., Roberts
T.P., 2011, AN, 332, 371-374
"New observations of ULX supershells, and their
implications"
[arXiv]
Sutton A.D., Roberts T.P., Walton D.J., 2011, AN, 332,
362-366
"Key results from an
XMM-Newton and Chandra study of a new sample of extreme ULXs from the
2XMM catalogue"
[arXiv]
Walton D.J., Gladstone J.C., Roberts T.P., Fabian A.C.,
2011, AN, 332, 354-357
"A large
catalogue of ultraluminous X-ray source candidates in nearby
galaxies"
[arXiv]
Gladstone J.C., Roberts T.P., Done C., 2011, AN, 332,
345-348
"Unlocking the nature of
ultraluminous X-ray sources using their X-ray
spectra"
[arXiv]
Middleton M., Roberts T.P., Done C., Jackson F., 2011,
MNRAS, 411, 644-652
``Challenging
times: a re-analysis of NGC 5408 X-1"
[arXiv]
Lehmer B.D., Alexander D.M., Bauer F.E., Brandt W.N., Goulding
A.D., Jenkins L.P., Ptak A., Roberts T.P., 2010, ApJ, 724,
559-571
``A Chandra Perspective On
Galaxy-Wide X-ray Binary Emission And Its Correlation With Star
Formation Rate And Stellar Mass: New Results From Luminous Infrared
Galaxies"
[arXiv]
Richings A.J., Fabbiano G., Wang J., Roberts T.P., 2010,
ApJ, 723, 1375-1392
``The hot
interstellar medium of the interacting galaxy NGC
4490"
[arXiv]
Vierdayanti K., Done C., Roberts T.P., Mineshige S., 2010,
MNRAS, 403, 1206-1212
``X-ray
spectral variability in the ultraluminous X-ray source Holmberg IX
X-1"
[arXiv]
Irwin J.A., Brink T.G., Bregman J.N., Roberts T.P., 2010,
ApJ, 712, L1-4
``Evidence for a
Stellar Disruption by an IMBH in an Extragalactic Globular
Cluster"
[arXiv]
Zampieri L., Roberts T. P., 2009, MNRAS, 400, 677-686
`` Low metallicity natal environments and
black hole masses in Ultraluminous X-ray
Sources"
[arXiv]
Gladstone J.C., Roberts T. P., Done C., 2009, MNRAS, 397,
1836-1851
`` The ultraluminous
state"
[arXiv]
Heil L.M., Vaughan S., Roberts T. P., 2009, MNRAS, 397,
1061-1072
`` A Systematic Study of
Variability in a Sample of Ultraluminous X-ray
Sources"
[arXiv]
Gladstone J.C., Roberts T. P., 2009, MNRAS, 397, 124-134
`` The ultraluminous X-ray source
population of NGC 4485/4490"
[arXiv]
Berghea C.T., Weaver K. A., Colbert E. J. M., Roberts T. P.,
2008, ApJ, 687, 471-487
``Testing the
Paradigm that Ultra-Luminous X-ray Sources as a Class Represent
Accreting Intermediate-Mass Black Holes"
[arXiv]
Roberts T.P., Levan A.J., Goad M.R., 2008, MNRAS, 387,
73-78
``New Hubble Space Telescope
imaging of the counterparts to six ultraluminous X-ray
sources"
[arXiv]
Barcons X., Carrera F.J., Ceballos M.T., Page M.J., Bussons-Gordo
J., Corral A., Ebrero J., Mateos S., Tedds J.A., Watson M.G., Baskill
D., Birkinshaw M., Boller T., Borisov N., Bremer M., Bromage G.E.,
Brunner H., Caccianiga A., Crawford C.S., Cropper M.S., Della Ceca R.,
Derry P., Fabian A.C., Guillout P., Hashimoto Y., Hasinger G., Hassall
B.J.M., Lamer G., Loaring N.S., Maccacaro T., Mason K.O., McMahon
R.G., Mirioni L., Mittaz J.P.D., Motch C., Negueruela I., Osborne
J.P., Panessa F., PNirez-Fournon I., Pye J.P., Roberts T.P.,
Rosen S., Schartel N., Schurch N., Schwope A., Severgnini P., Sharp
R., Stewart G.C., Szokoly G., UllNan A., Ward M.J., Warwick R.S.,
Wheatley P.J., Webb N.A., Worrall D., Yuan W., Ziaeepour H., 2007,
A&A, 496, 1191-1203
``The XMM-Newton
serendipitous survey. IV. Optical identification of the XMM-Newton
medium sensitivity survey (XMS)"
[arXiv]
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., 2007,
ApJL, 669, L21-24
``The orbital period of
the Wolf-Rayet binary IC10 X-1; dynamical evidence that the compact
object is a black hole"
[arXiv]
Roberts T.P., 2007, ApSS, 311, 203-212
``X-ray observations of ultraluminous X-ray
sources"
[arXiv]
Warwick R.S., Jenkins L.P., Read A.M., Roberts T.P., Owen
R.A., 2007, MNRAS, 376, 1611-1620
``An
XMM-Newton view of M101 - III. Diffuse X-ray
emission''
[arXiv]
Vazquez G.A., Hornschemeier A.E., Colbert E., Roberts T.P.,
Ward M.J., Malhotra S., 2007, ApJ, 658, L21-24
``Constraints on Accretion in Ultraluminous X-Ray
Sources from Spitzer IRS Observations of NGC 4485/4490: Infrared
Diagnostic Diagrams''
[arXiv]
Roberts T.P., Kilgard R.E., Warwick R.S., Goad M.R., Ward
M.J., 2006, MNRAS, 371, 1877-1890
``Chandra
monitoring observations of the ultraluminous X-ray source NGC 5204
X-1''
[arXiv]
Stobbart A.-M., Roberts T.P., Warwick R.S., 2006, MNRAS,
370, 25-42
``The X-ray properties of
the dwarf Magellanic-type galaxy NGC 55''
[arXiv]
Stobbart A.-M., Roberts T.P., Wilms J., 2006, MNRAS, 368,
397-413
``XMM-Newton observations of
the brightest ultraluminous X-ray sources''
[arXiv]
Goad M.R., Roberts T.P., Reeves J., Uttley P., 2006, MNRAS,
365, 191-198
``A deep XMM-Newton
observation of the ultraluminous X-ray source Ho II X-1: the case
against a 1000 solar mass black hole''
[arXiv]
Krauss M., Kilgard R., Garcia M., Roberts T.P., Prestwich
A., 2005, ApJ, 630, 228-237
``CXO
J013651.1+154547: Extreme variability in an ultraluminous X-ray source
in M74''
[arXiv]
Watson M.G., Roberts T.P., Akiyama M., Ueda Y., 2005, A&A,
437, 899-904
``Discovery of multiple
ultraluminous X-ray sources in the galaxy KUG
0214-057''
[arXiv]
Roberts T.P., Warwick R.S., Ward M.J., Goad M.R., Jenkins
L.P., 2005, MNRAS, 357, 1363-1369
``XMM-Newton EPIC observations of the ultraluminous
X-ray source NGC 5204 X-1''
[arXiv]
Jenkins L.P., Roberts T.P., Warwick R.S., Kilgard R.E., Ward
M.J., 2005, MNRAS, 357, 401-419
``An
XMM-Newton view of M101 - II. Global X-ray source
properties''
[arXiv]
Jenkins L.P., Roberts T.P., Ward M.J., Zezas A., 2005,
MNRAS, 357, 109-123
``XMM-Newton
observations of the interacting galaxy pairs NGC 7771/0 and NGC
2342/1''
[arXiv]
Jenkins L.P., Roberts T.P., Ward M.J., Zezas A., 2004,
MNRAS, 352, 1335-1346
``XMM-Newton
observations of the starburst merger galaxies NGC 3256 & NGC
3310''
[arXiv]
Stobbart A.-M., Roberts T.P., Warwick R.S., 2004, MNRAS,
351, 1063-1070
``A dipping black hole
X-ray binary candidate in NGC 55''
[arXiv]
Roberts T.P., Warwick R.S., Ward M.J., Goad M.R., 2004,
MNRAS, 350, 1536
``Erratum: Chandra
observations of five ultraluminous X-ray sources in nearby
galaxies''
[pdf]
Roberts T.P., Warwick R.S., Ward M.J., Goad M.R., 2004,
MNRAS, 349, 1193-1210
``Chandra
observations of five ultraluminous X-ray sources in nearby
galaxies''
[arXiv]
Jenkins L.P., Roberts T.P., Warwick R.S., Kilgard R.E., Ward
M.J., 2004, MNRAS, 349, 404-424
``An
XMM-Newton view of M101 - I. The luminous X-ray source
population''
[arXiv]
Roberts T.P., Goad M.R., Ward M.J., Warwick R.S., 2003,
MNRAS, 342, 709-714
``The unusual
supernova remnant surrounding the ultraluminous X-ray source IC 342
X-1''
[arXiv]
Roberts T.P., Colbert E.J.M., 2003, MNRAS, 341, L49-54
``Chandra reveals a
black-hole X-ray binary within the ultraluminous supernova remnant MF
16''
[arXiv]
Roberts T.P., Warwick R.S., Ward M.J., Murray S.S., 2002,
MNRAS, 337, 677-692
``A
Chandra observation of the interacting pair of galaxies NGC
4485/4490''
[arXiv]
Goad M.R., Roberts T.P., Knigge C., Lira P., 2002, MNRAS,
335, L67-70
``The optical counterpart of
the ultraluminous X-ray source NGC 5204 X-1''
[arXiv]
Schurch N.J., Roberts T.P., Warwick R.S., 2002, MNRAS,
335, 241-246
``High-resolution
X-ray imaging and spectroscopy of the core of NGC 4945 with
XMM-Newton and Chandra''
[arXiv]
Barcons X., Carrera F.J., Watson M.G., McMahon R.G., Aschenbach B.,
Freyburg M.J., Page K., Page M.J., Roberts T.P., Turner M.J.L.,
Ceballos M.T., Della Ceca R., Guillot P., Hasinger G., Maccacaro T.,
Mateos S., Motch C., Osborne J.P., Perez-Fournon I., Schwope A.,
Severgnini P., Szokoly G.P., Webb N., Wheatley P.J., Worrall D.M.,
2002, A&A, 382, 522-536
``The
XMM-Newton Serendipitous Survey: II. First results on the AXIS high
galactic latitude medium sensitivity survey"
[arXiv]
Roberts T.P., Goad M.R., Ward M.J., Warwick R.S., O'Brien
P.T., Lira P., Hands A.D.P., 2001, MNRAS, 325, L7-11
``The identification of an optical counterpart to the
super-Eddington X-ray source, NGC 5204 X-1''
[arXiv]
Roberts T.P., Schurch N.J., Warwick R.S., 2001, MNRAS, 324,
737-746
``Do LINER 2 galaxies harbour
low-luminosity Active Galactic Nuclei?''
[arXiv]
Pietsch W.N., Roberts T.P., Sako M., Freyberg M.J., Read
A.M., Borozdin K.N., Branduardi-Raymont G., Cappi M., Ehle M.,
Ferrando P., Kahn S.M., Ponman T.J., Ptak A., Shirey R.J., Ward M.,
2001, A&A, 365, L174-180
``XMM-Newton
observations of NGC 253: Resolving the emission components in the disk
and nuclear area''
[arXiv]
Watson M.G., Augueres J.-L., Ballet J., Barcons X., Barret D., Boer
M., Boller Th., Bromage G.E., Brunner H., Carrera F.J., Cropper M.S.,
Denby M., Ehle M., Elvis M., Fabian A.C., Freyberg M.J., Guillout P.,
Hameury J.-M., Hasinger G., Hinshaw D.A., Maccacaro T., Mason K.O.,
McMahon R.G., Michel L., Mirioni L., Mittaz J.P., Motch C., Olive
J.-F., Osborne J.P., Page C.G., Pakull M., Perry B.H., Pierre M.,
Pietsch W., Pye J.P., Read A.M., Roberts T.P., Rosen S.R.,
Sauvageot J.-L., Schwope A.D., Sekiguchi K., Stewart G.C., Stewart I.,
Valtchanov I., Ward M.J., Warwick R.S., West R.G., White N.E., Worral
D.M., 2001, A&A, 365, L51-59
``The
XMM-Newton Serendipitous Survey: I. The role of the XMM-Newton Survey
Science Centre''
[arXiv]
Hopwood M.E.L., Evans A., Roberts T.P., Burleigh M.,
Odenkirchen M., Beardmore A.P., O'Brien T., Jeffries R.D., Penny A.,
Eyres S.P.S., 2000, MNRAS, 316, L5-8
``A possible detection of diffuse extended X-ray
emission in the environment of the Globular Cluster
NGC6779''
[pdf]
Roberts T.P., Warwick R.S., 2000, MNRAS, 315, 98-115
``A ROSAT High Resolution Imager survey of
bright nearby galaxies''
[arXiv]
Roberts T.P., Warwick R.S., Ohashi T., 1999, MNRAS, 304,
52-60
``The X-ray properties of the
nearby LINER galaxy, NGC 4736''
[arXiv]
Warwick R.S., Roberts T.P., 1998, AN, 319, 59-62
``The extragalactic X-ray background at
0.25 keV''
[pdf]
Roberts T.P., Warwick R.S., 1998, AN, 319, 34
``Nuclear X-ray sources in nearby
galaxies''
[pdf]
Barber C.R., Roberts T.P., Warwick R.S., 1996, MNRAS, 282,
157-166
``Shadowing of the 0.25-keV
extragalactic X-ray background by the disc of NGC 55''
[pdf]
Walton D., Fuerst F., Bachetti M., Israel G., Pinto C., Brightman M., Heida M., Barret D., Fabian A., Earnshaw H., Middleton M., Roberts T.P., Webb N., Stern D., Pottschmidt K., Wilms J., Kretschmar P., Ptak A., 2023, HEAD, 20, #116.101
"The Long-Term Evolution of the ULX Pulsars NGC7793 P13 and NGC5907 ULX1"
Earnshaw H., Patti G., Brightman M., Walton D., Roberts T., Harrison F., 2023, AAS, 241, #233.01
"Chandra Monitoring of a Population of Ultraluminous X-ray Sources"
Walton, D., Roberts T., Earnshaw H., Mateos S., Patel N., Mackenzie A., Gully H., 2022, 44th COSPAR Scientific Assembly, Athens, Greece, abstract ID E1.4-00015-22
"A Multi-Mission Catalogue of Ultraluminous X-ray Source Candidates"
Walton, D., Mackenzie A., Gully H., Patel N., Roberts T., Earnshaw H., Mateos S., 2022, HEAD, 19, #110.86
"A Multi-Mission Catalogue of Ultraluminous X-ray Source Candidates"
West L., Garofali K., Lehmer B., Prestwich A., Eufrasio R., Luangtip W., Roberts T., Zezas A., 2021, AAS, 237, #427.07
"The Large Deficit of HMXB Emission from Luminous Infrared Galaxies: the Case of the Circumnuclear Starburst Ring in NGC 7552"
Brightman M., Earnshaw H., Walton D., Roberts T., 2020, ATel, 14220, 1
"Two X-ray transients in M51"
West L., Garofali K., Lehmer B., Prestwich A., Eufrasio R., Luangtip W., Roberts T., Zezas A., 2020, AAS, 236, #208.03
"The Large Deficit of HMXB Emission from Luminous Infrared Galaxies: the Case of the Circumnuclear Starburst Ring in NGC 7552"
Earnshaw H.P., Heida M., Brightman M., Fürst F., Jaodand A., Walton D., Middleton M., Roberts T., Stern D., Harrison F., 2020, AAS, 235, #237.02
"Monitoring the extreme long-term variability of NGC 925 ULX-3 "
Thongpoyai K., Luangtip W., Sawangwit U., Roberts T.P., Komonjinda S., Dhillon V.S., Marsh T.R., 2019, Journal of Physics: Conference Series, 1380, article id 012089
"Thai national telescope studies of ultraluminous X-ray sources"
Walton D., Pinto C., Sathyaprakash R., Roberts T., Nowak M., Alston W., Kosec P., Kara E., Fürst F., Fabian A., Soria R., Earnshaw H., Middleton M., Urquhart R., Guainazzi M., Bachetti M., Harrison F., Stern D., Barret D., Webb N., Canizares C., 2019, HEAD, 17, #200.04
"First Results from the Major XMM-Newton, Chandra and NuSTAR Campaign on the NGC 1313 Galaxy"
Brightman M., Balokovic M., Koss M., Alexander D., Annuar A., Earnshaw H.P., Gandhi P., Harrison F., Hornschemeier A., Lehmer B., Powell M., Ptak A., Rangelov B., Roberts T., Stern D., Walton D., Zezas A., 2019, AAS, 233, #454.03
"A Long Hard-X-Ray Look at the Dual Active Galactic Nuclei of M51 with NuSTAR"
Argo M., Coppola J., Mezcua M., Earnshaw H., Roberts T.P., 2019, 14th European VLBI Network Symposium (EVN 2018), in press. Published online here
"Searching for intermediate-mass black holes in NGC 3310"
Earnshaw H., Roberts T.P., Walton D., Middleton M., Mateos S., 2018, 42nd COSPAR Scientific Assembly, Pasadena, USA, abstract ID E1.13-22-18
"A new, clean catalogue of ULXs in nearby galaxies"
Heida M., Jonker P., Moon D.-S., Harrison F., Roberts T.P., Stern D., Walton D., Torres M., Lopez K.M., 2018, 42nd COSPAR Scientific Assembly, Pasadena, USA, abstract ID E1.13-25-18
"The donor stars of ultraluminous X-ray sources"
Roberts T.P., Earnshaw H., Walton D., Middleton M., Mateos S., 2017. In: "The X-ray Universe 2017", proceedings of the conference held 6-9 June in Rome, Italy. Edited by J.-U. Ness & S. Migliari, pg. 192. Published online here
"A new catalogue of ultraluminous X-ray sources (and more!)"
Brightman M., Annuar A., Alexander D.M., Earnshaw H., Gandhi P., Hornschemeier A.E., Lehmer B., Ptak A., Rangelov B., Roberts T.P., Stern D., Zezas A., 2017, HEAD, 16, #106.29
"A deep NuSTAR observation of M51: Investigating its Compton-thick nucleus, LINER companion and ULXs above 10 keV"
Roberts T., Middleton M., Sutton A., Mezcua M., Walton D., Heil L., 2015. In: "The Extremes of Black Hole Accretion". Presentations of the workshop held in Madrid, Spain, June 8-10 2015. Published online here.
"ULX behaviour: the ultraluminous state, winds and interesting anomalies"
Earnshaw H., Roberts T., Mezcua M., Middleton M., Sutton A., Done C., Harrison F., Heil L., Lansbury G., Walton D., 2015. In: "The Extremes of Black Hole Accretion". Presentations of the workshop held in Madrid, Spain, June 8-10 2015. Published online here.
"An Intermediate-Mass Black Hole candidate in M51"
Heida M., Jonker P.G., Torres M., Kool E., Servillat M., Roberts T.P., Groot P.J., Walton D., Moon D.-S., Harrison F., 2014, HEAD, 14, #404.04
"Near-infrared counterparts of ultraluminous X-ray sources - towards dynamical mass measurements"
Mezcua M., Lobanov A., Gladstone J., Farrell S., Fabbiano G., Soria R., Roberts T., Sutton A., 2014, 40th COSPAR Scientific Assembly, Moscow, Russia, E1.5-7-14
"Revealing jet radio emission from intermediate-mass black holes"
Roberts T., Middleton M., Sutton A., Heil L., Walton D.,
2014. In: "The X-ray Universe 2014". Presentations of the
conference held in Dublin, Ireland, 16-19 June, 2014. Published online
here.
"The ultraluminous state refined: spectral and
temporal characteristics of super-Eddington
accretion"
Luangtip W., Roberts T., Done C., 2014. In: "The X-ray
Universe 2014". Presentations of the conference held in Dublin,
Ireland, 16-19 June, 2014. Published online here.
"Suzaku observations of ultraluminous X-ray sources in
nearby galaxies"
Sutton A., Roberts T., Done C., 2014. In: "The X-ray
Universe 2014". Presentations of the conference held in Dublin,
Ireland, 16-19 June, 2014.
"Irradiated accretion discs in ultraluminous X-ray sources"
Luangtip W., Roberts T., Mineo S., Lehmer B., Alexander D., 2014. In: "The X-ray
Universe 2014". Presentations of the conference held in Dublin,
Ireland, 16-19 June, 2014. Published online here.
"A deficit of ultraluminous X-ray sources in luminous infrared galaxies"
Prestwich A.H., Jackson F., Kaaret P., Brorby M., Roberts T.P., Saar S.H., 2014, AAS, 223, #428.07
"X-ray Binaries and Feedback in Lyman-α Galaxies"
Sutton A.D., Roberts, T.P., Middleton M.J., 2013, Memorie della Societa Astronomica Italiana, 84, 639-640
"Energy dependent variability as a diagnostic of the ultraluminous state: key results"
Jackson F.E., Roberts, T.P., Zezas A., Kilgard R.E., 2013, AAS, 222, #403.04
"The brightest X-ray point sources in
M82"
Roberts T.P., Sutton A., Gladstone J., Walton D., Scott A., 2011. In: "The X-ray Universe 2011".
Presentations of the conference held in Berlin, Germany, 27-30 June,
2011. Published online here.
"The most luminous ULXs: evidence for IMBHs?"
Middleton M., Roberts T.P., Sutton A., Done C., Jackson F., 2011. In: "The X-ray Universe 2011".
Presentations of the conference held in Berlin, Germany, 27-30 June,
2011. Published online here.
"Characterising the timing and spectral properties of ULXs"
Gladstone J.C., Copperwheat C., Cartwright T., Roberts T.P., Heinke C., Levan A., 2011. In: "The X-ray Universe 2011".
Presentations of the conference held in Berlin, Germany, 27-30 June,
2011. Published online here.
"Optical counterparts to Ultraluminous X-ray sources"
Sutton A., Middleton M., Roberts T.P., 2011. In: "The X-ray Universe 2011".
Presentations of the conference held in Berlin, Germany, 27-30 June,
2011. Published online here.
"A detailed X-ray characterisation of ULXs"
Jackson F., Roberts T.P., Gelbord J., Ward M., Wardlow J.,
Alexander D., Watson M., 2011. In: "The X-ray Universe 2011".
Presentations of the conference held in Berlin, Germany, 27-30 June,
2011. Published online here.
"A Step towards solving the Optical Ambiguity of
Transition Objects"
Kilgard R.E., Roberts, T.P., Jackson F.E., Great NASA
Observatories M82 Extended Survey Team, 2011, AAS, 217, #325.07
"The Discrete X-ray Source Population of
M82"
Kuntz K.D., Strickland D.K., Heckman T.M., Armus L., Kilgard R.E.,
Ptak A., Roberts, T.P., Smith R.K., Ward M.J., Zezas A., AAS,
217, #114.07
"The New Chandra View of
M82"
Vierdayanti K., Done C., Roberts T.P., Mineshige S., 2010,
in: "The First Year of MAXI: Monitoring Variable X-ray Sources",
Poster Presentations, 4th International MAXI Workshop held November 30
- December 2, 2010 in Tokyo, Japan. Published online at here, poster ID 12
"X-ray spectral variability in the
ultraluminous X-ray source Holmberg IX X-1"
Roberts T.P., Gladstone J.C., Heil L.M., Done C., Vaughan
S.A., 2010, in: X-ray Astronomy 2009; present status,
multi-wavelength approach and future perspectives, Eds. Comastri,
Angelini & Cappi, AIP Conference Proceedings, Volume 1248,
pg. 123-126
"The Ultraluminous
State"
Jackson F.E., Roberts T.P., Gelbord J.M., Ward M.J., Wardlow
J.L., Alexander D.M., Watson M.G., 2010, in: X-ray Astronomy 2009;
present status, multi-wavelength approach and future perspectives,
Eds. Comastri, Angelini & Cappi, AIP Conference Proceedings, Volume
1248, pg. 449-450
"Revealing X-ray
luminous AGN in apparent starburst galaxies"
Zampieri L., Colpi M., Mapelli M., Patruno A., Roberts T.P.,
2010, in: X-ray Astronomy 2009; present status, multi-wavelength
approach and future perspectives, Eds. Comastri, Angelini & Cappi,
AIP Conference Proceedings, Volume 1248, pg. 97-100
"Ultraluminous X-ray Sources forming in low
metallicity natal environments"
Kilgard R.E., Roberts T.P., Jackson F.E., Great NASA
Observatories M82 Extended Survey Team, 2010, HEAD, 11, #2904
"Properties of the ULX population in M82
from the 480ks GNOM82ES observations"
Zezas A., Strickland D., Armus L., Heckman T., Kilgard R., Ptak A.,
Roberts T., Smith R., Ward M., 2010, HEAD, 11, #2903
"The Great NASA Observatories M82 Extended
Survey (GNOMES)"
Prestwich A., Galache J., Kalogera V., Linden T., Zezas A.,
Roberts T., Wolter A., Trinchieri G., Kilgard R., 2009. In:
Chandra's First Decade of Discovery, Proceedings of the conference
held 22-25 September, 2009 in Boston, MA., Eds. S. Wolk,
A. Fruscione, D. Swartz, #1827
"New
ULX in the collisional ring galaxy NGC 922"
Jenkins L., Brandt N., Colbert E., Levan A., Roberts T.,
Ward M., Zezas A., 2008, HEAD, 10, #39.04
"Investigating The Nuclear Activity Of Barred Spirals:
The case of NGC 1672"
Roberts T.P., 2008. In: ESAC Faculty Workshop on X-rays
from Nearby Galaxies, MPE-Report 295, Eds. S. Carpano, M. Ehle,
W. Pietsch, pg. 42-47
"What are
ultraluminous X-ray sources?"
Prestwich A. H., Carpano S., Kilgard R.E., Saar S.H., Crowther
P.A., Pollock A.M.T., Zezas A., Roberts T. P., Ward M. J.,
2008. In: ESAC Faculty Workshop on X-rays from Nearby
Galaxies, MPE-Report 295, Eds. S. Carpano, M. Ehle, W. Pietsch,
pg. 54-57
"IC 10 X-1 and NGC 300 X-1 -
our nearest ULX?"
Jenkins L.P., Brandt W.N., Colbert E.J.M., Levan A.J., Roberts
T.P., Ward M.J., Zezas A., 2008. In: ESAC Faculty Workshop on
X-rays from Nearby Galaxies, MPE-Report 295, Eds. S. Carpano,
M. Ehle, W. Pietsch, pg. 65-68
"New
insights into the X-ray properties of the nearby barred spiral galaxy
NGC 1672"
Jenkins L., Roberts T., Brandt N., Colbert E., Levan A.,
Zezas A., Ward M., 2006, HEAD, 9, #13.06
"New Insights Into The X-ray Properties Of NGC
1672"
Vazquez G.A., Colbert E., Hornschemeier A., Malhotra S., Roberts
T., Ward M., 2006, AAS, 208, #14.02
"Spitzer Observations of the X-ray Sources of NGC
4485/90"
Roberts T.P., Stobbart A-M., Goad M.R., Warwick R.S., Wilms
J., Uttley P., Reeves J. N., 2006, In: Populations of High Energy
Sources in Galaxies (Proceedings of the 230th Symposium of the
International Astronomical Union), Eds. E. J. A. Meurs,
G. Fabbiano. Cambridge: Cambridge University Press, pg. 288-292
"New insights into ultraluminous X-ray
sources from deep XMM-Newton observations"
Roberts T.P., Stobbart A.M., Goad M.R., Warwick R.S., Wilms
J., Uttley P., Reeves J.N., 2006, In: Proc. of "The X-ray Universe
2005", ESA SP-604, pg. 427-431
``New insights into ultraluminous X-ray sources from
deep XMM-Newton observations''
Kilgard R., Ward M., Roberts T., Prestwich A., 2005, AAS,
207, #138.04
"Optical counterparts to
X-ray sources in interacting galaxy systems"
Roberts T.P., Stobbart A.M., Warwick R.S., Wilms J., Goad
M., 2005, In: EPIC-XMM-Newton Consortium Meeting: 5 Years of
Science with XMM-Newton, MPE-Report 288, Eds. U. Briel, S. Sembay,
A. Read, pg. 49-53
``New insights into
ultraluminous X-ray sources from XMM-Newton/EPIC
observations''
Roberts T.P., Page K., Beardmore A., Racusin J.L., Kennea
J.A., White N., Hinshaw D., 2005, GCN, 3649, 1
``GRB 050714a: refined XRT analysis and afterglow
confirmation''
[text]
Racusin J.L., Kennea J.A., Burrows D.N., Roberts T., Page
K., Gehrels N., 2005, GCN, 3610, 1
``GRB 050714: swift XRT afterglow
position''
[text]
Jenkins L.P., Roberts T.P., Warwick R.S., Kilgard R.E., Ward
M.J., 2005, 35th COSPAR Scientific Assembly, Paris, France.,
p.3088
``An XMM-Newton view of the
luminous X-ray source population of M101''
Stobbart A.-M., Roberts T.P., Warwick R.S., 2005, 35th
COSPAR Scientific Assembly, Paris, France., p.3089
``XMM-Newton reveals a dipping black hole binary
candidate in NGC 55''
Roberts T.P., Warwick R.S., Stobbart A.-M., Goad M.R., Ward
M.J., Kilgard R.E., Jenkins L.P., 2004, HEAD, #8, #15.14
"A new description of the X-ray spectra of
ULXs"
Kilgard R.E., Roberts T.P., Warwick R.S., Ward M.J., Goad
M.R., 2004, HEAD, #8, #26.33
"Spectral and temporal variability of the ultraluminous X-ray source
NGC 5204 X-1"
Berghea C.T., Colbert E.J.M., Roberts T.P., 2004, AAS, 204,
#15.14
"A Comparison Between Spectral
Properties of ULXs and Luminous X-ray Binaries"
Jenkins L., Roberts T., Warwick R., Kilgard R., Ward M.,
2004, Mem. S.A.It., 75, 490
``An
XMM-Newton view of the luminous X-ray source population of
M101''
Stobbart A.-M., Roberts T.P., Warwick R.S., 2004,
Mem. S.A.It., 75, 496
``XMM-Newton
reveals a dipping black hole binary candidate in NGC
55''
Vaughan S., Willingale R., O'Brien P.T., Osborne J., Levan A.,
Tedds J., Roberts T., Watson M., Watson D., 2004, GCN, 2489, 1
"GRB 031203: discovery of a dust
echo"
[text]
Roberts T.P., Goad M.R., Ward M.J., Warwick R.S., 2003,
invited article in the ING newsletter, issue 7, pg. 8-9
``The unusual supernova remnant surrounding the
ultraluminous X-ray source IC 342 X-1''
Ward M.J., Roberts T.P., Kilgard R.E., Prestwich A.H.,
Zezas A., Jenkins L., 2003, IAUS, 221E, 142
"High Resolution X-Ray Studies of Starformation in
Galaxies"
Krauss M.I., Kilgard R.E., Garcia M.R., Roberts T.P.,
Prestwich A.H., 2003, HEAD, #7, #17.36
"CXOU J013651.1+154547: An Extremely Variable ULX in
M74"
Ward M., Roberts T., Kilgard R., Prestwich A., 2002, 34th COSPAR
Scientific Assembly, p. 3017
"Evidence for black hole binary systems in spiral and star-forming
galaxies"
Kilgard R., Krauss M., Prestwich A., Kaaret P., Garcia M., Zezas
A., Ward M., Roberts T.P., 2002, AAS, 201, #14.16
"A Chandra Survey of Nearby Spiral
Galaxies"
Kilgard R., Kaaret P., Krauss M., Prestwich A., Roberts
T.P., Ward M., 2002, APS, APR #B17.102
"Ultra-luminous X-ray Sources in Nearby Spiral
Galaxies"
Roberts T.P., Goad M.R., Ward M.J., Warwick R.S., Lira P.,
2002, to appear in: New visions of the X-ray universe in the
XMM-Newton and Chandra era, eds. Jansen F. et al., ESA SP-488, arXiv/0202017
``The nature of ultraluminous X-ray
sources in nearby galaxies''
Roberts T.P., Warwick R.S., 2001, In: X-ray Astronomy
2000, ASP Conference Series, Vol. 234, Eds. R. Giaconni,
L. Stella, S.Serio, pg. 569-574
``Constraints on the composition of the soft
extragalactic X-ray background from 0.25 keV shadowing
experiments"
Roberts T.P., Warwick R.S., 2001, In: X-ray Astronomy:
Stellar Endpoints, AGN, and the Diffuse X-ray Background,
eds. White, Malaguti & Palumbo, AIP Conference Proceedings, Volume
599, pg. 474-477
``A ROSAT HRI survey
of bright nearby galaxies''
Roberts T.P., Goad M.R., Ward M.J., Warwick R.S., O'Brien
P.T., Lira P., Hands A.D.P., 2001, AAS, 198, #50.10
``An X-ray/optical study of
IXOs''
Roberts T.P., 2001, Physics Review, Vol. 10, No. 3, 18-22
[Review article on XMM-Newton mission for UK schools physics magazine]
``X-rays from the
violent universe''
Ptak A., Pietsch W., Borozdin K., Branduardi-Raymont G., Cappi M.,
Ehle M., Ferrando P., Freyberg M., Kahn S., Ponman T., Read A.,
Roberts,T., Sako M., Shirey R., Ward, M., 2000, AAS, 197, #92.04
"XMM-Newton Observations of NGC 253:
Resolving the Soft and Hard X-ray Emission''
Cappi M., Pietsch W., Ward, M., Ferrando P., Sako M., Kahn S.,
Branduardi-Raymont G., Borozdin K., Shirey R., Freyberg M.,
Roberts,T., Ptak A., 2000, HEAD, #5, #15.15
"The origin of the soft and hard X-ray emission in
NGC253: Results from an XMM PV observation''
Shirey R., Pietsch W., Read A., Freyberg M., Tiengo A., Ehle M.,
Cappi M., La Palombara N., Molendi S., Priedhorsky W., Borozdin K.,
Mason K., Soria R., Branduardi-Raymont G., Breeveld A., Sasseen T.,
Watson M., Sembay S., Ward, M., Roberts,T., Ferrando P.,
Paerels F., Kahn S., Sako M., Ptak A., Ponman T., 2000, HEAD, #5,
#28.02
"X-ray Binaries in the Nearby
Galaxies M31 and NGC 253 Observed with XMM-Newton''
Roberts T.P., Warwick R.S., 1998, In: Science With
XMM, Conference held at ESTEC, Noordwijk, The Netherlands,
Sep. 30- Oct. 2, 1998. Published online here.
``ROSAT HRI observations of nearby galactic
nuclei''
Roberts T.P., 1998, PhD thesis, University of Leicester
``Soft X-ray observations of nearby
galaxies''
[abstract]
Warwick R.S., Barber C.R., Roberts T.P., 1996, In:
Proc. Rontgenstrahlung from the Universe, eds. Zimmermann,
Trumper & Yorke, pg. 345-346
``Shadowing of the Extragalactic 0.25 keV
Background''
This page written and maintained by Tim Roberts. Last updated 04/12/23
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