6 High-Frequency Variability in Neutron-Star Low-Mass X-ray Binaries
331
184. R. Wijnands, J. Homan, M. van der Klis, E. Kuulkers, J. van Paradijs, W.H.G. Lewin, F.K.
Lamb, D. Psaltis, B. Vaughan, Discovery of kHz quasi-periodic oscillations in the Z source
Cygnus X-2. Astrophys. J. Lett. 493(2), L87–L90 (1998)
185. W. Yu, M. van der Klis, Kilohertz quasi-periodic oscillation frequency anticorrelated with
millihertz quasi-periodic oscillation flux in 4U 1608-52. Astrophys. J. Lett. 567(1), L67–L70
(2002)
186. W. Yu, M. van der Klis, P.G. Jonker, Dependence of kilohertz quasi-periodic oscillation
properties on the normal-branch oscillation phase in Scorpius X-1. Astrophys. J. Lett. 559(1),
L29–L32 (2001)
187. W. Zhang, T.E. Strohmayer, J.H. Swank, Discovery of two simultaneous kilohertz quasiperiodic oscillations in the persistent flux of GX 349+2. Astrophys. J. Lett. 500(2), L167–
L169 (1998)
188. G. Zhang, M. Méndez, A. Sanna, E.M. Ribeiro, J.D. Gelfand, Relation between spectral
changes and the presence of the lower kHz QPO in the neutron star low-mass X-ray binary
4U 1636-53. Mon. Not. R. Astron. Soc. 465(4), 5003–5010 (2017)
189. A. Zoghbi, P. Uttley, A.C. Fabian, Understanding reverberation lags in 1H0707-495. Mon.
Not. R. Astron. Soc. 412(1), 59–64 (2011)
190. A. Zoghbi, A.C. Fabian, C.S. Reynolds, E.M. Cackett, Relativistic iron K X-ray reverberation
in NGC 4151. Mon. Not. R. Astron. Soc. 422(1), 129–134 (2012)
331
184. R. Wijnands, J. Homan, M. van der Klis, E. Kuulkers, J. van Paradijs, W.H.G. Lewin, F.K.
Lamb, D. Psaltis, B. Vaughan, Discovery of kHz quasi-periodic oscillations in the Z source
Cygnus X-2. Astrophys. J. Lett. 493(2), L87–L90 (1998)
185. W. Yu, M. van der Klis, Kilohertz quasi-periodic oscillation frequency anticorrelated with
millihertz quasi-periodic oscillation flux in 4U 1608-52. Astrophys. J. Lett. 567(1), L67–L70
(2002)
186. W. Yu, M. van der Klis, P.G. Jonker, Dependence of kilohertz quasi-periodic oscillation
properties on the normal-branch oscillation phase in Scorpius X-1. Astrophys. J. Lett. 559(1),
L29–L32 (2001)
187. W. Zhang, T.E. Strohmayer, J.H. Swank, Discovery of two simultaneous kilohertz quasiperiodic oscillations in the persistent flux of GX 349+2. Astrophys. J. Lett. 500(2), L167–
L169 (1998)
188. G. Zhang, M. Méndez, A. Sanna, E.M. Ribeiro, J.D. Gelfand, Relation between spectral
changes and the presence of the lower kHz QPO in the neutron star low-mass X-ray binary
4U 1636-53. Mon. Not. R. Astron. Soc. 465(4), 5003–5010 (2017)
189. A. Zoghbi, P. Uttley, A.C. Fabian, Understanding reverberation lags in 1H0707-495. Mon.
Not. R. Astron. Soc. 412(1), 59–64 (2011)
190. A. Zoghbi, A.C. Fabian, C.S. Reynolds, E.M. Cackett, Relativistic iron K X-ray reverberation
in NGC 4151. Mon. Not. R. Astron. Soc. 422(1), 129–134 (2012)