HE
H. Earnshaw
astro-ph.HEastro-ph.GAastro-ph.IMastro-ph.SRgr-qcphysics.data-anphysics.plasm-phstat.AP
On Valency
published · living versionsW_rx29bnyt·v1 · currentpublished
The Hunt for Pulsating Ultraluminous X-ray Sources
with X. Song, D. J. Walton, G. B. Lansbury, P. A. Evans +2
1 version
Preprints & journals
46 papers in the corpus · 2015–2026A Newly Identified Transient Ultraluminous X-ray Source in M312610.08918v1 · Ferdinand, Murray Brightman, Jean-Marie Hameury et al.2026 · 0 citationsarXiv
A Broadband X-ray Analysis and Optical Counterpart Search of IC5052 ULX2608.24539v1 · Nabil Brice, Dominic J. Walton, Felix Furst et al.2026 · 0 citationsarXiv
A NuSTAR study of quasi-periodic oscillations from the ultraluminous X-ray sources in M822505.16921v1 · Hamza El Byad, Matteo Bachetti, Silvia Columbu et al.2025 · 3 citationsApJ, 989, 202 (2025)
XMM-Newton Conclusively Identifies an Active Galactic Nucleus in a Green Pea Galaxy2505.08885v1 · Peter G. Boorman, Jir'i Svoboda, Daniel Stern et al.2025 · 1 citationarXiv
Optimal Follow-Up of Gravitational-Wave Events with the UltraViolet EXplorer (UVEX)2502.17560v4 · Leo P. Singer, Alexander W. Criswell, Sydney C. Leggio et al.2025 · 4 citationsPASP 137 074501 (2025)
Electromagnetic Follow-up to Gravitational Wave Events with the UltraViolet EXplorer (UVEX)2501.14109v4 · Alexander W. Criswell, Sydney C. Leggio, Michael W. Coughlin et al.2025 · 3 citationsPASP 137, 054101 (2025)
The long-term variability of a population of ULXs monitored by Chandra2411.07459v1 · Hannah P. Earnshaw, Gauri Patti, Murray Brightman et al.2024 · 3 citationsarXiv
A New Broadband Spectral State in the Ultraluminous X-ray Source Holmberg IX X-12409.12241v2 · D. J. Walton, M. Bachetti, P. Kosec et al.2024 · 2 citationsarXiv
Skipping a beat: discovery of persistent quasi-periodic oscillations associated with pulsed fraction drop of the spin signal in M51 ULX-72407.09240v1 · Matteo Imbrogno, Sara Elisa Motta, Roberta Amato et al.2024 · 10 citationsarXiv
Return to the forgotten ULX: a broadband NICER+NuSTAR study of NGC 4190 ULX-12403.13973v2 · Hannah P Earnshaw, Matteo Bachetti, Murray Brightman et al.2024 · 1 citationarXiv
The High Energy X-ray Probe (HEX-P): Studying Extreme Accretion with Ultraluminous X-ray Sources2311.04733v2 · Matteo Bachetti, Matthew J. Middleton, Ciro Pinto et al.2023 · 6 citationsarXiv
Early hard X-rays from the nearby core-collapse supernova SN2023ixf2306.04827v1 · Brian W. Grefenstette, Murray Brightman, Hannah P. Earnshaw et al.2023 · 59 citationsarXiv
A new sample of transient ultraluminous X-ray sources serendipitously discovered by Swift/XRT2305.01693v1 · Murray Brightman, Jean-Marie Hameury, Jean-Pierre Lasota et al.2023 · 13 citationsarXiv
Probing the nature of the low state in the extreme ultraluminous X-ray pulsar NGC 5907 ULX12302.03425v1 · F. Fuerst, D. J. Walton, G. L. Israel et al.2023 · 25 citationsA&A 672, A140 (2023)
Unveiling the disc structure in ultraluminous X-ray source NGC 55 ULX-12207.12870v2 · F. Barra, C. Pinto, D. J. Walton et al.2022 · 12 citationsarXiv
The variability behavior of NGC 925 ULX-32206.08397v1 · Hannah P. Earnshaw, Murray Brightman, Fiona A. Harrison et al.2022 · 4 citationsarXiv
Measuring the Evolution of the NuSTAR Detector Gains2206.04058v3 · Brian Grefenstette, Murray Brightman, Hannah P. Earnshaw et al.2022 · 1 citationarXiv
Reconstruction of the NuSTAR point spread function using single-laser metrology2202.04685v1 · Hannah P. Earnshaw, Kristin K. Madsen (1, Karl Forster et al.2022 · 1 citationarXiv
Characterization of Low Light Performance of a CMOS sensor for Ultraviolet Astronomical Applications2112.01691v3 · Timothee Greffe, Roger Smith, Myles Sherman et al.2021 · 4 citationsarXiv
Orbital decay in M82 X-22112.00339v2 · Matteo Bachetti, Marianne Heida, Thomas Maccarone et al.2021 · 34 citationsApJ 937, 125 (2022)
Science with the Ultraviolet Explorer (UVEX)2111.15608v3 · S. R. Kulkarni, Fiona A. Harrison, Brian W. Grefenstette et al.2021 · 39 citationsarXiv
Evolution of the spin, spectrum and super-orbital period of the ultraluminous X-ray pulsar M51 ULX72111.05342v1 · Murray Brightman, Matteo Bachetti, Hannah Earnshaw et al.2021 · 13 citationsarXiv
A Multi-Mission Catalogue of Ultraluminous X-ray Source Candidates2110.07625v1 · D. J. Walton, A. D. A. Mackenzie, H. Gully et al.2021 · 79 citationsarXiv
Broadband X-ray spectral variability of the pulsing ULX NGC 1313 X-22106.04501v2 · A. Robba, C. Pinto, D. J. Walton et al.2021 · 18 citationsA&A 652, A118 (2021)
Long-term pulse period evolution of the ultra-luminous X-ray pulsar NGC 7793 P132105.04229v1 · F. Fuerst, D. J. Walton, M. Heida et al.2021 · 29 citationsA&A 651, A75 (2021)
Quasi-periodic dipping in the ultraluminous X-ray source, NGC 247 ULX-12104.11163v2 · W. N. Alston, C. Pinto, D. Barret et al.2021 · 22 citationsarXiv
XMM-Newton campaign on the ultraluminous X-ray source NGC 247 ULX-1: outflows2104.11164v2 · C. Pinto, R. Soria, D. Walton et al.2021 · 68 citationsarXiv
Enhanced X-ray Emission from the Most Radio-Powerful Quasar in the Universe's First Billion Years2103.03879v1 · Thomas Connor, Eduardo Banados, Daniel Stern et al.2021 · 32 citationsarXiv
A New Transient Ultraluminous X-ray Source in NGC 70902011.08870v2 · D. J. Walton, M. Heida, M. Bachetti et al.2020 · 16 citationsarXiv
The Ultraluminous X-ray sources population of the galaxy NGC 74562001.08752v2 · F. Pintore, M. Marelli, R. Salvaterra et al.2020 · 19 citationsarXiv
The (re)appearance of NGC 925 ULX-3, a new transient ULX2001.00642v2 · Hannah P. Earnshaw, Marianne Heida, Murray Brightman et al.2020 · 20 citationsarXiv
XMM-Newton Campaign On Ultraluminous X-ray Source NGC 1313 X-1: Wind vs. State Variability1911.09568v2 · C. Pinto, D. J. Walton, E. Kara et al.2019 · 52 citationsarXiv
Discovery of a soft X-ray lag in the Ultraluminous X-ray Source NGC 1313 X-11911.09582v1 · E. Kara, C. Pinto, D.J. Walton et al.2019 · 24 citationsarXiv
The Unusual Broadband X-ray Spectral Variability of NGC 1313 X-1 seen with XMMNewton, Chandra and NuSTAR1911.09622v2 · D. J. Walton, C. Pinto, M. Nowak et al.2019 · 52 citationsarXiv
The Hunt for Pulsating Ultraluminous X-ray Sources1910.11857v1 · X. Song, D. J. Walton, G. B. Lansbury et al.2019 · 34 citationsarXivon Valency
The discovery of weak coherent pulsations in the ultraluminous X-ray source NGC 1313 X-21906.00640v1 · R. Sathyaprakash, T.P. Roberts, D. J. Walton et al.2019 · 163 citationsarXiv
A broadband look at the old and new ULXs of NGC 69461905.03383v1 · Hannah P. Earnshaw, Brian W. Grefenstette, Murray Brightman et al.2019 · 21 citationsarXiv
Breaking the limit: Super-Eddington accretion onto black holes and neutron stars1903.06844v1 · M. Brightman, M. Bachetti, H. P. Earnshaw et al.2019 · 9 citationsarXiv
Searching for intermediate-mass black holes in NGC33101812.05958v1 · Megan Argo, Joseph Coppola, Mar Mezcua et al.2018 · 2 citationsarXiv
A new, clean catalogue of extragalactic non-nuclear X-ray sources in nearby galaxies1812.04684v1 · H. P. Earnshaw, T. P. Roberts, M. J. Middleton et al.2018 · 72 citationsarXiv
A long hard-X-ray look at the dual active galactic nuclei of M51 with NuSTAR1805.12140v2 · M. Brightman, M. Balokovi'c, M. Koss et al.2018 · 22 citationsarXiv
Searching for propeller-phase ULXs in the XMM-Newton Serendipitous Source Catalogue1802.07753v1 · H. P. Earnshaw, T. P. Roberts, R. Sathyaprakash2018 · 51 citationsarXiv
Soft Extragalactic X-Ray Binaries at the Eddington Threshold1702.00313v1 · Hannah M. Earnshaw, Timothy P. Roberts2017 · 19 citationsarXiv
From ultraluminous X-ray sources to ultraluminous supersoft sources: NGC 55 ULX, the missing link1612.05569v2 · C. Pinto, W. Alston, R. Soria et al.2016 · 124 citationsarXiv
A variable ULX and possible IMBH candidate in M51a1512.04825v2 · Hannah M. Earnshaw, Timothy P. Roberts, Lucy M. Heil et al.2015 · 35 citationsarXiv
An Intermediate-Mass Black Hole Candidate in M51?1510.02277v1 · H.M. Earnshaw2015 · 5 citationsarXiv
Career total: 76 works. 46 are in this corpus.
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