Average pulse shape model for leading edge timing with Ge(Li) coaxial detector

1990 ◽  
Vol 37 (3) ◽  
pp. 1248-1253 ◽  
Author(s):  
M.A. El-Wahab ◽  
A. El-Arabi ◽  
M.H. Battrawi
Keyword(s):  
Pulse Shape ◽  
Leading Edge ◽  
Shape Model ◽  
Coaxial Detector

scholarly journals Luminosity Dependent Changes of Pulse Profiles in the X-ray Binary GX 1+4

1998 ◽  
Vol 15 (2) ◽  
pp. 254-258 ◽  
Author(s):  
J. G. Greenhill ◽  
D. Galloway ◽  
M. C. Storey
Keyword(s):  
Satellite Data ◽  
Pulse Shape ◽  
Leading Edge ◽  
High State ◽  
Trailing Edge ◽  
X Ray ◽  
Binary Pulsar ◽  
New Information ◽  
Coherent Picture

AbstractWe have reviewed the X-ray pulse profiles from a large number of observations of the accreting binary pulsar GX 1+4 obtained during the last 25 years. The profiles cover various energy ranges between 1 and 100 keV. Using these data we present a coherent picture of present and past pulse profiles and the variations of these pulse profiles with time. The pulse shape is dependent on both the X-ray luminosity and whether the pulsar is spinning up or down. Profiles measured during the GX 1+4 high state in the 1970s are all trailing edge bright. Subsequently the profiles have generally been symmetric or leading edge bright. Rossi X-ray Timing Explorer (RXTE) satellite data taken in July 1996 show that similar pulse shape variations can occur on a timescale of hours. The implications of this new information for accretion models is discussed.

Generalized Time Response Formulation for Array Fields

1971 ◽  
Vol 49 (14) ◽  
pp. 1929-1939
Author(s):  
J. F. A. Ormsby ◽  
M. R. Weiss
Keyword(s):  
Transient Response ◽  
Pulse Shape ◽  
Linear Array ◽  
Input Pulse ◽  
Leading Edge ◽  
Far Field ◽  
Viewing Angle ◽  
Antenna Feed ◽  
Generalized Time ◽  
Field Integral

An analysis is provided for the far-field transient response of a linear array antenna. The analytic formulation uses a particularly concise vector field integral equation and is generalized in two ways. First, in contrast to earlier work, the effects of fill time and delay time are simultaneously treated and second, the solutions are derived in terms of the far-field impulse response providing closed form expressions for a large variety of input signals.Results are a function of input pulse shape, viewing angle, frequency, and antenna feed mechanism. Specific analytic computations are given for a variety of pulse shapes, antenna illumination functions, and pulse feeds. To illustrate the formulas, particular numerical results and curves are displayed comparing the leading edge transient response of a center-fed system using both rectangular and cosine shaped pulses at two viewing angles.

Pulse Distortion by Anisotropic Plasmas

1972 ◽  
Vol 50 (11) ◽  
pp. 1221-1223
Author(s):  
M. P. Bachynski ◽  
B. W. Gibbs
Keyword(s):  
Plasma Density ◽  
Strong Interaction ◽  
Incident Wave ◽  
Pulse Shape ◽  
Leading Edge ◽  
Experimental Measurements ◽  
Electromagnetic Pulses ◽  
Pulse Distortion ◽  
Maximum Penetration

Experimental measurements have been performed of electromagnetic pulses transmitted through a plasma under conditions of strong interaction (strong heating of the electrons) between the incident wave and the plasma. Severe pulse distortion depending on the plasma density and pulse shape can occur. The leading edge of the pulse does not always show maximum penetration through the plasma.

Solar Flare Energetic Neutral Emission Measurements in the Project Coronas-I

1994 ◽  
Vol 144 ◽  
pp. 635-639
Author(s):  
J. Baláž ◽  
A. V. Dmitriev ◽  
M. A. Kovalevskaya ◽  
K. Kudela ◽  
S. N. Kuznetsov ◽  
...  
Keyword(s):  
Solar Flare ◽  
Energy Range ◽  
Gamma Rays ◽  
Pulse Shape ◽  
Gamma Ray ◽  
Pulse Shape Discrimination ◽  
Shape Discrimination ◽  
Solar Neutron ◽  
Low Altitude

AbstractThe experiment SONG (SOlar Neutron and Gamma rays) for the low altitude satellite CORONAS-I is described. The instrument is capable to provide gamma-ray line and continuum detection in the energy range 0.1 – 100 MeV as well as detection of neutrons with energies above 30 MeV. As a by-product, the electrons in the range 11 – 108 MeV will be measured too. The pulse shape discrimination technique (PSD) is used.

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