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A NICER Discovery of a Low-Frequency Quasi-Periodic Oscillation in the Soft-Intermediate State of MAXI J1535-571
A. L. Stevens, P. Uttley, D. Altamirano +17
We present the discovery of a low-frequency Hz quasi-periodic oscillation (QPO) feature in observations of the black hole X-ray binary MAXI J1535-571 in its soft-inte…
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…
A NICER Spectrum of MAXI J1535-571: Near-Maximal Black Hole Spin and Potential Disk Warping
J. M. Miller, K. Gendreau, R. M. Ludlam +10
We report on a NICER observation of the Galactic X-ray binary and stellar-mass black hole candidate, MAXI J1535-571. The source was likely observed in an "intermediate" or "very hi…
A Persistent Disk Wind in GRS 1915+105 with NICER
Joey Neilsen, E. Cackett, R. A. Remillard +13
The bright, erratic black hole X-ray binary GRS 1915+105 has long been a target for studies of disk instabilities, radio/infrared jets, and accretion disk winds, with implications…
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…
Detection of Reflection Features in the Neutron Star Low-Mass X-ray Binary Serpens X-1 with NICER
R. M. Ludlam, J. M. Miller, Z. Arzoumanian +17
We present Neutron Star Interior Composition Explorer (NICER) observations of the neutron star low-mass X-ray binary Serpens X-1 during the early mission phase in 2017. With the hi…
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…