Gamma-ray astronomy

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Peculiar spectral and power spectral behaviour of the LMXB GX 13+1

(2003)

Authors:

RS Schnerr, T Reerink, M van der Klis, J Homan, M Méndez, RP Fender, E Kuulkers
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Uses and limitations of relativistic jet proper motions: lessons from Galactic microquasars

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 340:4 (2003) 1353-1358
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Hard X-ray Flares Preceding Soft X-ray Outbursts in Aquila X-1: A Link between Neutron Star and Black Hole State Transitions

(2003)

Authors:

Wenfei Yu, Marc Klein-Wolt, Rob Fender, Michiel van der Klis
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The mass of the neutron star in Vela X-1 and tidally induced non-radial oscillations in GP Vel

Astronomy & Astrophysics EDP Sciences 401:1 (2003) 313-323

Authors:

H Quaintrell, AJ Norton, TDC Ash, P Roche, B Willems, TR Bedding, IK Baldry, RP Fender
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Simultaneous single-pulse observations of radio pulsars III. The behaviour of circular polarization

ArXiv astro-ph/0303619 (2003)

Authors:

A Karastergiou, S Johnston, M Kramer

Abstract:

We investigate circular polarization in pulsar radio emission through simultaneous observations of PSR B1133+16 at two frequencies. In particular, we investigate the association of the handedness of circular polarization with the orthogonal polarization mode phenomenon at two different frequencies. We find the association to be significant across the pulse for PSR B1133+16, making a strong case for orthogonal polarization modes determining the observed circular polarization. The association however is not perfect and decreases with frequency. Based on these results and assuming emission occurs in superposed orthogonal polarization modes, we present a technique of mode decomposition based on single pulses. Average profiles of the polarization of each mode can then be computed by adding the individual mode-separated single pulses. We show that decomposing single pulses produces different average profiles for the orthogonal polarization modes from decomposing average profiles. Finally, we show sample single pulses and discuss the implications of the frequency dependence of the correlation of the circular polarization with the orthogonal polarization mode phenomenon.
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