We zoom in on the internal structure of the low-frequency quasi-periodic oscillation (LF QPO) often observed in black hole binary systems to investigate the physical nature of the lack of coherence...
We develop a new statistical test for the wavelet power spectrum. We design it with purpose of testing signals which intrinsic variability displays in a Fourier domain a red-noise component described...
Lachowicz, Pawel, Czerny, Bozena, Abramowicz, Marek A.
Following our previous work of Lachowicz & Czerny (2005), we explore further the application of the continuous wavelet transform to X-ray astronomical signals. Using the public archive of the...
Periodic long-term X-ray and radio variability of Cygnus X-1 (2005)
Lachowicz, Pawel, Zdziarski, Andrzej A., Schwarzenberg-Czerny, Alex, Pooley, Guy G., Kitamoto, Shunji
We present a comprehensive analysis of long-term periodic variability of Cyg X-1 using the method of multiharmonic analysis of variance (mhAoV) applied to available monitoring data since 1969, in...
Wavelet analysis of millisecond variability of Cygnus X-1 during its failed state transition (2004)
Lachowicz, Pawel, Czerny, Bozena
Application of multi-resolution analysis adopting wavelets in order to investigate millisecond aperiodic X-ray variability of Cyg X-1 is presented. This relatively new approach in a time-series...
Membrane Hydrocarbon Thickness Modulates the Dynamics of a Membrane Transport Protein
Xu, Qi, Kim, Miyeon, Ho, K. W. David, Lachowicz, Pawel, Fanucci, Gail E., Cafiso, David S.
Nitroxide spin labels were incorporated into selected sites within the β-barrel of the bacterial outer-membrane transport protein BtuB by site-directed mutagenesis, followed by chemical modification...