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Astron. Astrophys. 335, 991-994 (1998)


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A search for the optical counterpart of PSR B1951+32 in the supernova remnant CTB 80 *

Créidhe O'Sullivan 1, A. Shearer 2, M. Colhoun 2, A. Golden 1, M. Redfern 1, R. Butler 3, G.M. Beskin 4, S.I. Neizvestny 4, V.V. Neustroev 4, V.L. Plokhotnichenko 4 and A. Danks 5

1 Department of Physics, National University of Ireland Galway, Ireland
2 Information Technology Centre, National University of Ireland Galway, Ireland
3 Department of Mathematics and Statistics, University of Edinburgh, Scotland
4 SAO, Nizhnij Arhyz, Karachai-Cherkessia, Russia
5 STX/Goddard Space Flight Centre, Greenbank, Maryland, USA

Received 9 March 1998 / Accepted 30 April 1998

Abstract

Using time-resolved two-dimensional aperture photometry we have put upper limits on the pulsed emission from two proposed optical counterparts for PSR B1951+32. Our pulsed upper limits of [FORMULA], [FORMULA], for the first candidate and [FORMULA], [FORMULA] for the second, make it unlikely that either of these is, in fact, the pulsar. We discuss three further candidates, but also reject these on the basis of timing results. A search of a [FORMULA] area centred close to these stars failed to find any significant pulsations at the reported pulsar period.

Key words: pulsars: individual: PSR B1951+32 – ISM: individual objects: CTB 80

* Based on observations taken at SAO, Zelenchuk, Karachai-Cherkessia, Russia

Send offprint requests to: C. O'Sullivan, (creidhe@physics.ucg.ie)

© European Southern Observatory (ESO) 1998

Online publication: June 26, 1998

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