Narrow iron K line and warm iron K edge in pulse phase spectra of Hercules X-1

2005 ◽  
pp. 138-142
Author(s):  
Peter Kahabka
Keyword(s):  
Pulse Phase ◽  
Phase Spectra

CONSTRUCTION PRINCIPLES OF TECHNICALLY INVARIANT QUARTZ GENERATORS BASED ON THE DOUBLE-LOOP PULSE PHASE LOCKING SYSTEMS

2019 ◽  
Vol 78 (13) ◽  
pp. 1167-1177
Author(s):  
S. K. Pidchenko ◽  
A. A. Taranchuk ◽  
A. Totsky ◽  
V. B. Sharonov
Keyword(s):  
Phase Locking ◽  
Double Loop ◽  
Pulse Phase

scholarly journals A NuSTAR confirmation of the 36 ks hard X-ray pulse-phase modulation in the magnetar 1E 1547.0 − 5408

2021 ◽  
Vol 502 (2) ◽  
pp. 2266-2284
Author(s):  
Kazuo Makishima ◽  
Teruaki Enoto ◽  
Hiroki Yoneda ◽  
Hirokazu Odaka
Keyword(s):  
Time Lapse ◽  
Phase Behaviour ◽  
Modulation Amplitude ◽  
Axial Deformation ◽  
Physical Processes ◽  
Arrival Times ◽  
Pulse Phase ◽  
Phase Variations ◽  
Complex Phenomena ◽  
Made In

ABSTRACT This paper describes an analysis of the NuSTAR data of the fastest-rotating magnetar 1E 1547 − 5408, acquired in 2016 April for a time lapse of 151 ks. The source was detected with a 1–60 keV flux of 1.7 × 10−11 erg s−1 cm−2, and its pulsation at a period of 2.086710(5) s. In 8–25 keV, the pulses were phase-modulated with a period of T = 36.0 ± 2.3 ks, and an amplitude of ∼0.2 s. This reconfirms the Suzaku discovery of the same effect at $T=36.0 ^{+4.5}_{-2.5}$ ks, made in the 2009 outburst. These results strengthen the view derived from the Suzaku data, that this magnetar performs free precession as a result of its axial deformation by ∼0.6 × 10−4, possibly caused by internal toroidal magneti fields (MFs) reaching ∼1016 G. Like in the Suzaku case, the modulation was not detected in energies below ∼8 keV. Above 10 keV, the pulse-phase behaviour, including the 36 ks modulation parameters, exhibited complex energy dependencies: at ∼22 keV, the modulation amplitude increased to ∼0.5 s, and the modulation phase changed by ∼65° over 10–27 keV, followed by a phase reversal. Although the pulse significance and pulsed fraction were originally very low in >10 keV, they both increased noticeably, when the arrival times of individual photons were corrected for these systematic pulse-phase variations. Possible origins of these complex phenomena are discussed, in terms of several physical processes that are specific to ultrastrong MFs.

Nucleosynthesis of fluorine in low-mass AGB stars during the thermal pulse phase

1996 ◽  
Vol 20 (2) ◽  
pp. 231-238
Author(s):  
Yong-xing Liu ◽  
Bo Zhang ◽  
Qiu-he Peng
Keyword(s):  
Agb Stars ◽  
Thermal Pulse ◽  
Pulse Phase ◽  
Low Mass

An ab Initio Calculation of the Valence Excitation Spectrum of H2O···Cl2: Comparison to Condensed Phase Spectra†

2009 ◽  
Vol 113 (26) ◽  
pp. 7563-7569 ◽  
Author(s):  
Ricardo Franklin-Mergarejo ◽  
Jesus Rubayo-Soneira ◽  
Nadine Halberstadt ◽  
Tahra Ayed ◽  
Margarita I. Bernal Uruchurtu ◽  
...  
Keyword(s):  
Ab Initio ◽  
Excitation Spectrum ◽  
Condensed Phase ◽  
Ab Initio Calculation ◽  
Phase Spectra

Wide band pulse phase resolved spectroscopy with BeppoSax

1999 ◽  
Vol 69 (1-3) ◽  
pp. 151-157 ◽  
Author(s):  
A. Santangelo ◽  
S. Del Sordo ◽  
S. Piraino ◽  
A. Segreto ◽  
G. Cusumano ◽  
...  
Keyword(s):  
Wide Band ◽  
Pulse Phase

Kalman filter based demodulation in a dual-pulse phase-OTDR

Laser Physics ◽  
2021 ◽  
Vol 31 (3) ◽  
pp. 035101
Author(s):  
A E Alekseev ◽  
B G Gorshkov ◽  
A V Bashaev ◽  
V T Potapov ◽  
M A Taranov ◽  
...  
Keyword(s):  
Kalman Filter ◽  
Pulse Phase

Determination of crustal thickness from spectral behavior of SH waves

1969 ◽  
Vol 59 (3) ◽  
pp. 1247-1258
Author(s):  
Abou-Bakr K. Ibrahim
Keyword(s):  
Amplitude Spectrum ◽  
Body Waves ◽  
Multiple Reflections ◽  
Matrix Formulation ◽  
Sh Waves ◽  
Crustal Model ◽  
Amplitude Spectra ◽  
Phase Spectra ◽  
Zero Phase

abstract The amplitude spectrum obtained from Haskell's matrix formulation for body waves travelling through a horizontally layered crustal model shows a sequence of minima and maxima. It is known that multiple reflections within the crustal layers produce constructive and destructive interferences, which are shown as maxima and minima in the amplitude spectrum. Analysis of the minima in the amplitude spectra, which correspond to zero phase in the phase spectra, enables us to determine the thickness of the crust, provided the ratio of wave velocity in the crust to velocity under the Moho is known.

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