A5039619117- Pulsars and Gravitational Waves Research
- High-pressure geophysics and materials
- Astrophysical Phenomena and Observations
- Spectroscopy Techniques in Biomedical and Chemical Research
- Geophysics and Sensor Technology
- Crystallography and Radiation Phenomena
- Advanced Fiber Laser Technologies
- Electron Spin Resonance Studies
- Radio Astronomy Observations and Technology
- Gamma-ray bursts and supernovae
- Seismic Imaging and Inversion Techniques
- Particle Accelerators and Free-Electron Lasers
- Photoreceptor and optogenetics research
- Blind Source Separation Techniques
- Superconducting Materials and Applications
Istanbul University
2021-2025
Astronomy and Space
2025
We present a detailed spectral study of an intermittent-AMXP Aql X-1 during the \textit{pulse-on} and \textit{pulse-off} stages by using archival RXTE data. first perform temporal analysis Z$_n^2$ technique in three different energy bands, 3.0 -- 13.0~keV, 13.0 23.0~keV 23.0 33.0~keV, for last 128~s time segment data including region. show that pulse is most significant softest band. We, then, spectrum represented best via combination absorbed blackbody, disk blackbody gaussian line. modeled...
Abstract We present a detailed spectral study of an intermittent-AMXP Aql X-1 during the pulse-on and pulse-off stages by using archival RXTE data. first perform temporal analysis Z$_n^2$ technique in three different energy bands, 3.0 – 13.0 keV, 23.0 keV 33.0 for last 128 s time segment data including region. show that pulse is most significant softest band. We, then, spectrum represented best via combination absorbed blackbody, disk blackbody gaussian line. modeled four segments...
We present a detailed systematic pulse search for three Intermittent-Accreting Millisecond X-ray Pulsars (Intermittent-AMXPs), HETE J1900.1-2455, SAX J1748.9-2021 & Aql X-1, via Z$_1^2$ and maximum likelihood (ML) techniques by using 16 years data of Rossi Timing Explorer/Proportional Counter Array (RXTE/PCA) in the energy range 3.0 - 13.0 keV. first performed scan technique millisecond sensitivities every 25 s time interval with 1 shifts to cover all set around detected frequencies given...
Abstract We report the temporal and spectral analysis of three thermonuclear X-ray bursts from 4U 1608−52, observed by Neutron Star Interior Composition Explorer (NICER) during just after outburst source in 2020. In two bursts, we detect secondary peaks 30 18 s initial peaks. The show a fast rise exponential decay-like shape resembling burst. Time-resolved reveals that peak flux, blackbody temperature, apparent emitting radius values are agreement with previously while same for tend toward...