Articles by R. M. Ludlam

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R. M. Ludlam

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Simultaneous NICER and NuSTAR Observations of the Neutron Star Low-mass X-ray Binary Serpens X-1

28 January 2025 by Holden Hall and others

High Energy Astrophysical Phenomena

The High Energy X-ray Probe (HEX-P): A New Window into Neutron Star Accretion

8 November 2023 by R. Ludlam and others

High Energy Astrophysical Phenomena, Instrumentation and Methods for Astrophysics

Revealing the spectral state transition of the Clocked Burster, GS 1826-238 with NuSTAR StrayCats

27 January 2023 by S. Yun and others

High Energy Astrophysical Phenomena

NuSTAR spectral analysis beyond 79 keV with stray light

28 September 2022 by G. Mastroserio and others

High Energy Astrophysical Phenomena

StrayCats II: An Updated Catalog of NuSTAR Stray Light Observations

20 June 2022 by R. Ludlam and others

High Energy Astrophysical Phenomena

MAXI and NuSTAR observations of the faint X-ray transient MAXI J1848-015 in the GLIMPSE-C01 Cluster

26 February 2022 by Sean Pike and others

High Energy Astrophysical Phenomena

Radius Constraints from Reflection Modeling of Cygnus X-2 with NuSTAR and NICER

27 January 2022 by R. Ludlam and others

High Energy Astrophysical Phenomena

A Spectroscopic Angle on Central Engine Size Scales in Accreting Neutron Stars

8 November 2021 by Nicolas Trueba and others

High Energy Astrophysical Phenomena

A Comprehensive X-ray Report on AT2019wey

4 September 2021 by Yuhan Yao and others

High Energy Astrophysical Phenomena

Photospheric Radius Expansion and a double-peaked type-I X-ray burst from GRS 1741.9-2853

24 June 2021 by Sean Pike and others

High Energy Astrophysical Phenomena

Simultaneous NICER and NuSTAR Observations of the Ultra-compact X-ray Binary 4U 1543-624

9 March 2021 by R. Ludlam and others

High Energy Astrophysical Phenomena

Measuring the masses of magnetic white dwarfs: A NuSTAR Legacy Survey

27 August 2020 by A. Shaw and others

High Energy Astrophysical Phenomena

X-ray Spectral and Timing evolution of MAXI J1727-203 with NICER

22 July 2020 by Kevin Alabarta and others

High Energy Astrophysical Phenomena

NICER-NuSTAR Observations of the Neutron Star Low-Mass X-ray Binary 4U 1735-44

14 April 2020 by R. Ludlam and others

High Energy Astrophysical Phenomena

The Soft State of the Black Hole Transient Source MAXI J1820+070: Emission from the Edge of the Plunge Region?

22 February 2020 by A. Fabian and others at

Institute of Astronomy University of Cambridge

High Energy Astrophysical Phenomena

A strongly changing accretion morphology during the outburst decay of the neutron star X-ray binary 4U 1608-52

10 February 2020 by J. Van Den Eijnden and others

High Energy Astrophysical Phenomena

Constraining the dense matter equation of state with joint analysis of NICER and LIGO/Virgo measurements

26 December 2019 by Geert Raaijmakers and others

High Energy Astrophysical Phenomena, Nuclear Theory

PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter

12 December 2019 by M. Miller and others

High Energy Astrophysical Phenomena, Nuclear Theory

A NICER view of PSR J0030+0451: Implications for the dense matter equation of state

12 December 2019 by Geert Raaijmakers and others

High Energy Astrophysical Phenomena, Solar and Stellar Astrophysics

A NICER Look at Strong X-ray Obscuration in the Seyfert-2 Galaxy NGC 4388

21 August 2019 by Jonah Maxwell Miller and others at

University of Michigan

High Energy Astrophysical Phenomena

Observations of the Ultra-compact X-ray Binary 4U 1543-624 in Outburst with NICER, INTEGRAL, Swift, and ATCA

1 August 2019 by R. Ludlam and others

High Energy Astrophysical Phenomena

NICER Discovers Spectral Lines During Photospheric Radius Expansion Bursts from 4U 1820-30: Evidence for Burst-driven Winds

3 June 2019 by T. Strohmayer and others

High Energy Astrophysical Phenomena

NuSTAR Observations of the Accreting Atolls GX 3+1, 4U 1702-429, 4U 0614+091, and 4U 1746-371

1 February 2019 by R. Ludlam and others

High Energy Astrophysical Phenomena

A NICER Discovery of a Low-Frequency Quasi-Periodic Oscillation in the Soft-Intermediate State of MAXI J1535-571

24 September 2018 by A. Stevens and others

High Energy Astrophysical Phenomena

NICER Observes the Effects of an X-Ray Burst on the Accretion Environment in Aql X-1

20 August 2018 by Laurens Keek and others

High Energy Astrophysical Phenomena

A NICER Spectrum of MAXI J1535-571: Near-Maximal Black Hole Spin and Potential Disk Warping

11 June 2018 by Jonah Maxwell Miller and others at

University of Michigan

High Energy Astrophysical Phenomena

Detection of Reflection Features in the Neutron Star Low-Mass X-ray Binary Serpens X-1 with NICER

2 May 2018 by R. Ludlam and others

High Energy Astrophysical Phenomena

Relativistic Disk Reflection in the Neutron Star X-ray Binary XTE J1709-267 with NuSTAR

9 March 2017 by R. Ludlam and others

High Energy Astrophysical Phenomena

A Hard Look at the Neutron Stars and Accretion Disks in 4U 1636-53, GX 17+2, and 4U 1705-44 with \emph{NuSTAR}

6 January 2017 by R. Ludlam and others

High Energy Astrophysical Phenomena

NuSTAR and XMM-Newton Observations of the Neutron Star X-ray Binary 1RXS J180408.9-34205

14 April 2016 by R. Ludlam and others

High Energy Astrophysical Phenomena

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High Energy Astrophysical Phenomena Nuclear Theory Instrumentation and Methods for Astrophysics Solar and Stellar Astrophysics Astrophysics of Galaxies