Gamma-ray astronomy

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Simultaneous radio and X-ray observations of the low-mass X-ray binary GX 13+1

(2003)

Authors:

Jeroen Homan, Rudy Wijnands, Michael P Rupen, Rob Fender, Robert M Hjellming, Tiziana di Salvo, Michiel van der Klis
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A universal radio–X-ray correlation in low/hard state black hole binaries

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 344:1 (2003) 60-72

Authors:

E Gallo, RP Fender, GG Pooley
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LOFAR: A NEW RADIO TELESCOPE FOR LOW FREQUENCY RADIO OBSERVATIONS: SCIENCE AND PROJECT STATUS

World Scientific Publishing (2003) 69-76

Authors:

H RÖTTGERING, AG DE BRUYN, RP FENDER, J KUIJPERS, MP VAN HAARLEM, M JOHNSTON-HOLLITT, GK MILEY
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Jet-dominated states: an alternative to advection across black hole event horizons in ‘quiescent’ X-ray binaries

Monthly Notices of the Royal Astronomical Society Oxford University Press (OUP) 343:4 (2003) l99-l103

Authors:

RP Fender, E Gallo, PG Jonker
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|V|: New insight into the circular polarization of radio pulsars

ArXiv astro-ph/0308221 (2003)

Authors:

A Karastergiou, S Johnston, D Mitra, AGJ van Leeuwen, RT Edwards

Abstract:

We present a study of single pulses from nine bright northern pulsars to investigate the behaviour of circular polarisation, V. The observations were conducted with the Effelsberg 100-m radio telescope at 1.41 GHz and 4.85 GHz and the Westerbork radio telescope at 352 MHz. For the first time, we present the average profile of the absolute circular polarisation |V| in the single pulses. We demonstrate that the average profile of |V| is the distinguishing feature between pulse components that exhibit low V in the single pulses and components that exhibit high V of either handedness, despite both cases resulting in a low mean. We also show that the |V| average profile remains virtually constant with frequency, which is not generally the case for V, leading us to the conclusion that |V| is a key quantity in the pulsar emission problem.
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