Gamma-ray astronomy

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Hard X-ray states and radio emission in GRS 1915+105

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 331:3 (2002) 745-764

Authors:

M Klein-Wolt, RP Fender, GG Pooley, T Belloni, S Migliari, EH Morgan, M van der Klis
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Initial low/hard state, multiple jet ejections and X-ray/radio correlations during the outburst of XTE J1859+226

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 331:3 (2002) 765-775

Authors:

C Brocksopp, RP Fender, M McCollough, GG Pooley, MP Rupen, RM Hjellming, CJ de La Force, RE Spencer, TWB Muxlow, ST Garrington, S Trushkin
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Spectral, polarization and time-lag properties of GRS 1915+105 radio oscillations

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 330:1 (2002) 212-218

Authors:

RP Fender, D Rayner, SA Trushkin, K O'Brien, RJ Sault, GG Pooley, RP Norris
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The death of FRII radio sources and their connection with radio relics

(2002)

Authors:

Christian R Kaiser, Garret Cotter
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Simultaneous single-pulse observations of radio pulsars II. Orthogonal polarization modes in PSR B1133+16

Astronomy and Astrophysics 391:1 (2002) 247-251

Authors:

A Karastergiou, M Kramer, S Johnston, AG Lyne, NDR Bhat, Y Gupta

Abstract:

In this letter, we present a study of orthogonal polarization modes in the radio emission of PSR B1133+16, conducted within the frame of simultaneous, multi-frequency, single-pulse observations. Simultaneously observing at two frequencies (1.41 GHz and 4.85 GHz) provides the means to study the bandwidth of polarization features such as the polarization position angle. We find two main results. First, that there is a high degree of correlation between the polarization modes at the two frequencies. Secondly, the modes occur more equally and the fractional linear polarization decreases towards higher frequencies. We discuss this frequency evolution and propose propagation effects in the pulsar magnetosphere as its origin.
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