A&A 379, 270-278 (2001)
DOI: 10.1051/0004-6361:20011306

Simultaneous single-pulse observations of radio pulsars

I. The polarization characteristics of PSR B0329+54

A. Karastergiou¹, A. von Hoensbroech¹, M. Kramer², D. R. Lorimer³, A. G. Lyne², O. Doroshenko¹, A. Jessner¹, C. Jordan² and R. Wielebinski<sup>1

1</sup>  Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany
²  Jodrell Bank Observatory, University of Manchester, Macclesfield, Chesire SK11 9DL, UK
³  Arecibo Observatory, HC3 Box 53995, Arecibo, Puerto Rico, PR 00612, USA

(Received 23 July 2001 / Accepted 19 September 2001 )

Abstract
We present the first results from a programme of multi-frequency simultaneous single pulse observations carried out as part of the European Pulsar Network. We detail the main data analysis methods and apply them to simultaneous observations of the strong pulsar B0329+54 at 1.4 and 2.7 GHz using the Jodrell Bank and Effelsberg radio telescopes respectively. The pulses at different frequencies are highly correlated in their total intensity, as seen in previous experiments, and generally show consistent position angles of the linearly polarized component. In contrast, the circularly polarized emission sometimes shows clear differences between pulses received at different frequencies. These results are unexpected and warrant further follow-up studies to interpret them in the context of the intrinsic bandwidth of pulsar radiation.

Key words: pulsars: PSR B0329+54 -- polarization

Offprint request: A. Karastergiou, akara@mpifr-bonn.mpg.de

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