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The Comptonising medium of the neutron star in 4U 1636-53 through its lower kilohertz Quasi-Periodic Oscillations
Konstantinos Karpouzas, Mariano Méndez, Evandro M. Ribeiro +3
Inverse Compton scattering dominates the high energy part of the spectra of neutron star (NS) low mass X-ray binaries (LMXBs). It has been proposed that inverse Compton scattering…
An evolving broad iron line from the first Galactic ultraluminous X-ray pulsar Swift J0243.6+6124
Gaurava K. Jaisawal, Colleen A. Wilson-Hodge, Andrew C. Fabian +15
We present a spectral study of the ultraluminous Be/X-ray transient pulsar Swift J0243.6+6124 using Neutron Star Interior Composition Explorer (NICER) observations during the syste…
A NICER thermonuclear burst from the millisecond X-ray pulsar SAX J1808.4-3658
Peter Bult, Gaurava K. Jaisawal, Tolga Güver +9
The Neutron Star Interior Composition Explorer (NICER) has extensively monitored the August 2019 outburst of the 401 Hz millisecond X-ray pulsar SAX J1808.4-3658. In this Letter, w…
NICER observes a secondary peak in the decay of a thermonuclear burst from 4U 1608-52
Gaurava K. Jaisawal, Jérôme Chenevez, Peter Bult +14
We report for the first time below 1.5 keV, the detection of a secondary peak in an Eddington-limited thermonuclear X-ray burst observed by the Neutron Star Interior Composition Ex…
NICER Observation of Unusual Burst Oscillations in 4U 1728-34
Simin Mahmoodifar, Tod E. Strohmayer, Peter Bult +9
The Neutron Star Interior Composition Explorer (NICER) has observed seven thermonuclear X-ray bursts from the Low Mass X-ray Binary (LMXB) neutron star 4U 1728-34 from the start of…
Observations of the Ultra-compact X-ray Binary 4U 1543-624 in Outburst with NICER, INTEGRAL, Swift, and ATCA
R. M. Ludlam, L. Shishkovsky, P. M. Bult +17
We report on X-ray and radio observations of the ultra-compact X-ray binary 4U 1543-624 taken in August 2017 during an enhanced accretion episode. We obtained NICER monitoring of t…