Observing pulsars and fast transients with LOFAR

B. W. Stappers 1 J. W. T. Hessels 2 A. Alexov 3 K. Anderson T. Coenen 3 T. Hassall 1 A. Karastergiou 4 V. I. Kondratiev 5 M. Kramer 6 J. van Leeuwen 2 J. D. Mol 7 A. Noutsos 6 J. W . Romein P. Weltevrede 1 R. Fender 8 R. A. M. J. Wijers L. Bähren 3 M. E. Bell J. Broderick 8 E. J. Daw 9 V. S. Dhillon 9 J. Eislöffel 10 H. Falcke Jean-Mathias Grießmeier 11, 12 C. Law 3 S. Markoff 3 J. C. A. Miller-Jones 3 B. Scheers 3 H. Spreeuw 3 J. Swinbank 3 S. ter Veen 13 M. W. Wise 5, 3 O. Wucknitz 14 P. Zarka 15 J. Anderson 16 A. Asgekar 5 I. M. Avruch 17 R. Beck 18 P. Bennema M. J. Bentum 5 P. Best J. Bregman 5 M. Brentjens 5 R. H. van de Brink 5 P. C. Broekema W. N. Brouw 19 M. Brüggen 20 A. G. de Bruyn 19 H. R. Butcher 5 B. Ciardi 21 J. Conway 22 R. -J. Dettmar 23 A. van Duin J. van Enst M. Garrett 5, 24 M. Gerbers 5 T. Grit 5 A. Gunst 5 M. P. van Haarlem 5 J. P. Hamaker G. Heald 5 M. Hoeft 10 H. Holties 5 A. Horneffer L. V. E. Koopmans 19 G. Kuper 5 M. Loose 25 P. Maat 5 D. Mckay-Bukowski 26 J. P. Mckean 5 G. Miley R. Morganti 27, 19 R. Nijboer 5 J. E. Noordam 5 M. Norden H. Olofsson 28 M. Pandey-Pommier 29 A. Polatidis 5 W. Reich 6 H. Röttgering 24 A. Schoenmakers 5 J. Sluman 5 O. Smirnov 30 M. Steinmetz C. G. M. Sterks 31 Michel Tagger 12 Y. Tang 32 R. Vermeulen 5 N. Vermaas C. Vogt 5 M. de Vos S. J. Wijnholds 5 S. Yatawatta 5 A. Zensus 6
Abstract : Low frequency radio waves, while challenging to observe, are a rich source of information about pulsars. The LOw Frequency ARray (LOFAR) is a new radio interferometer operating in the lowest 4 octaves of the ionospheric "radio window": 10-240MHz, that will greatly facilitate observing pulsars at low radio frequencies. Through the huge collecting area, long baselines, and flexible digital hardware, it is expected that LOFAR will revolutionize radio astronomy at the lowest frequencies visible from Earth. LOFAR is a next-generation radio telescope and a pathfinder to the Square Kilometre Array (SKA), in that it incorporates advanced multi-beaming techniques between thousands of individual elements. We discuss the motivation for low-frequency pulsar observations in general and the potential of LOFAR in addressing these science goals. We present LOFAR as it is designed to perform high-time-resolution observations of pulsars and other fast transients, and outline the various relevant observing modes and data reduction pipelines that are already or will soon be implemented to facilitate these observations. A number of results obtained from commissioning observations are presented to demonstrate the exciting potential of the telescope. This paper outlines the case for low frequency pulsar observations and is also intended to serve as a reference for upcoming pulsar/fast transient science papers with LOFAR.
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B. W. Stappers, J. W. T. Hessels, A. Alexov, K. Anderson, T. Coenen, et al.. Observing pulsars and fast transients with LOFAR. Astronomy and Astrophysics - A&A, EDP Sciences, 2011, 530 (A80), 32 p. ⟨10.1051/0004-6361/201116681⟩. ⟨insu-01310941⟩

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