Results 261 to 270 of about 1,910,738 (272)

QED and X-Ray Pulsars

Publications of the Astronomical Society of Australia, 1985
AbstractTechniques in QED (quantum electrodynamics) have been developed previously (see for example Melrose and Parle 1983) allowing one to treat electron-photon and photon-photon interactions exactly in the magnetized vacuum and allowing one to include the effects of a medium.
Michelle C. Allen, D. B. Melrose, A. J. Parle   +2 more
openaire   +2 more sources

X-ray Pulsar in the Crab Nebula

Science, 1969
X-ray pulsations have been observed in the Crab Nebula at a frequency closely matching the radio and optical pulsations. About 5 percent of the total x-ray power of the nebula appears in the pulsed component. The x-ray pulsations have the form of a main pulse and an interpulse separated by about 12 milliseconds.
John F. Meekins, T. A. Chubb, G. Fritz, Richard C. Henry, Herbert Friedman   +4 more
openaire   +3 more sources

The X-ray optics for X-ray pulsar navigation

SPIE Proceedings, 2016
The effective X-ray optics is a key premise for X-ray pulsar detection and navigation. However, it is very difficult to focus the X-ray photons through refraction for the reason that the X-ray photon is very easy to be absorbed by the materials. The most effective ways for the X-ray focusing is reflection.
Shi Yufeng, Sun Shukun, Wang Wencong, Li Wenbin, Juan Song, Jian Lian, Jin Dongdong   +6 more
openaire   +1 more source

Pulsars and the Universal X-ray Background

Nature, 1970
IT is now established that there is a universal X-ray background with an energy flux of about 10−7 erg cm−2 sr−1 s−1 (M. Oda, at the thirty-seventh IAU symposium, Rome, 1969). One possibility is that the background is a superposition of X-ray emission by all the galaxies in the universe, but the value obtained by taking the average X-ray emission per ...
openaire   +3 more sources

X-ray scattering in x-ray binary pulsars

AIP Conference Proceedings, 1994
In x‐ray pulsars, the emission from the bottom of the accretion column in the magnetic pole propagates to the observers through the surrounding environment: the magnetosphere, the accretion disk and the disk corona, the stellar wind, the companion’s atmosphere, and finally the interstellar medium.
openaire   +2 more sources

An X-ray pulsar with a superstrong magnetic field in the soft γ-ray repeater SGR1806 − 20

Nature, 1998
C. Kouveliotou, C. Kouveliotou, S. Dieters, S. Dieters, T. Strohmayer, T. Strohmayer, J. Paradijs, G. Fishman, C. Meegan, K. Hurley, J. Kommers, I. Smith, D. Frail, T. Murakami   +13 more
semanticscholar   +1 more source

An X-ray pulsar in SNR G109.1–1.0

Nature, 1981
G. Fahlman, P. Gregory
semanticscholar   +1 more source

Novel algorithm for X-ray pulsar navigation against doppler effects

IEEE Transactions on Aerospace and Electronic Systems, 2015
Jin Liu, J. Fang, Z. Kang, J. Wu, X. Ning   +4 more
semanticscholar   +1 more source

Observations of a flaring X-ray pulsar in Dorado

Nature, 1979
E. Mazets, S. Golenetskii, V. Il’inskii, R. Aptekar', Yu. A. Guryan   +4 more
semanticscholar   +1 more source

Towards practical autonomous deep-space navigation using X-Ray pulsar timing

, 2016
S. Shemar, G. Fraser, L. Heil, D. Hindley, A. Martindale, P. Molyneux, J. Pye, R. Warwick, A. Lamb   +8 more
semanticscholar   +1 more source