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|a Bult, Peter
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|a Massachusetts Institute of Technology. Department of Physics
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|a MIT Kavli Institute for Astrophysics and Space Research
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|a Chakrabarty, Deepto
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|a Altamirano, Diego
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|a Arzoumanian, Zaven
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|a Cackett, Edward M.
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|a Chakrabarty, Deepto
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|a Doty, John
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|a Enoto, Teruaki
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|a Gendreau, Keith C.
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|a Guillot, Sebastien
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|a Homan, Jeroen
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|a Jaisawal, Gaurava K.
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|a Lamb, Frederick K.
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|a Ludlam, Renee M.
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|a Mahmoodifar, Simin
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|a Markwardt, Craig
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|a Okajima, Takashi
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|a Price, Sam
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|a Strohmayer, Tod E.
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|a Winternitz, Luke
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|a NICER Detects a Soft X-Ray Kilohertz Quasi-periodic Oscillation in 4U 0614+09
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|b American Astronomical Society,
|c 2019-03-15T17:59:13Z.
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|z Get fulltext
|u http://hdl.handle.net/1721.1/120989
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|a 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 exposure on the X-ray burster 4U 0614+09, we detect multiple instances of a single-peak upper kHz QPO, with centroid frequencies that range from 400 to 750 Hz. We resolve the kHz QPO as a function of energy, and measure, for the first time, the QPO amplitude below 2 keV. We find the fractional amplitude at 1 keV is on the order of 2% rms, and discuss the implications for the QPO emission process in the context of Comptonization models. Key words: accretion, accretion disks - stars: neutron - X-rays: binaries - X-rays: individual (4U 0614+09
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|a Article
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|t The Astrophysical Journal
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