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Astron. Astrophys. 358, 169-176 (2000)

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A 1400-MHz pilot search for young pulsars

D.R. Lorimer, M. Kramer, P. Müller, N. Wex, A. Jessner, C. Lange and R. Wielebinski

Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany

Received 3 November 1999 / Accepted 21 December 1999


We have used the Effelsberg 100-m radio telescope to conduct a 1400-MHz ([FORMULA] 21-cm) search for young and rapidly rotating radio pulsars along a 2 deg2 strip of the northern Galactic plane defined by [FORMULA] and [FORMULA]. This region lies close to the Scutum spiral arm which is already known to contain a number of radio and X-ray pulsars. The search was nominally sensitive to pulsars with 1400-MHz flux densities above 0.3 mJy; this represents a threefold improvement in sensitivity over all previous searches of this region of the Galaxy. Four new long-period pulsars were discovered as a result of this survey. All three previously known pulsars in this region were also detected. The four new pulsars are relatively young ([FORMULA] 0.5 Myr), weak ([FORMULA] mJy) sources with dispersion measures in the range 170-910 cm-3 pc. None of the newly-discovered pulsars are associated with catalogued supernova remnants.

Key words: telescopes – techniques: miscellaneous – stars: pulsars: individual: PSR J1841 – 0345, PSR J1842 – 0415, PSR J1844 – 0310, PSR J1845 – 0316

Present address: National Astronomy and Ionospheric Center, Arecibo Observatory, HC3 Box 53995, PR 00612, USA

Present address: University of Manchester, Jodrell Bank Observatory, Macclesfield, Cheshire, SK11 9DL, UK

Send offprint requests to: D.R. Lorimer (dunc@naic.edu)

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© European Southern Observatory (ESO) 2000

Online publication: June 26, 2000