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NICER Detection of Strong Photospheric Expansion during a Thermonuclear X-Ray Burst from 4U 1820-30
L. Keek, Z. Arzoumanian, D. Chakrabarty +13
The Neutron Star Interior Composition Explorer (NICER) on the International Space Station (ISS) observed strong photospheric expansion of the neutron star in 4U 1820-30 during a Ty…
NICER Observes the Effects of an X-Ray Burst on the Accretion Environment in Aql X-1
L. Keek, Z. Arzoumanian, P. Bult +18
Accretion disks around neutron stars regularly undergo sudden strong irradiation by Type I X-ray bursts powered by unstable thermonuclear burning on the stellar surface. We investi…
NICER Discovers the Ultracompact Orbit of the Accreting Millisecond Pulsar IGR J17062-6143
Tod E. Strohmayer, Zaven Arzoumanian, Slavko Bogdanov +17
We present results of recent Neutron Star Interior Composition Explorer observations of the accreting millisecond X-ray pulsar IGR J17062-6143 that show that it resides in a circul…
NICER Discovers mHz Oscillations in the "Clocked" Burster GS 1826-238
Tod E. Strohmayer, Keith C. Gendreau, Diego Altamirano +12
We report the discovery with the Neutron Star Interior Composition Explorer (NICER) of mHz X-ray brightness oscillations from the "clocked burster." NICER observed the source in th…
A NICER look at the Aql X-1 hard state
Peter Bult, Zaven Arzoumanian, Edward M. Cackett +16
We report on a spectral-timing analysis of the neutron star low-mass X-ray binary Aql~X-1 with the Neutron Star Interior Composition Explorer (NICER) on the International Space Sta…
NICER Detects a Soft X-ray Kilohertz Quasi-periodic Oscillation in 4U 0614+09
Peter Bult, Diego Altamirano, Zaven Arzoumanian +16
We report on the detection of a kilohertz quasi-periodic oscillation (QPO) with the Neutron Star Interior Composition Explorer (NICER). Analyzing approximately 165 ks of NICER expo…