EDP Sciences
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Volume 365, Number 1, January I 2001
First Results from XMM-Newton
Page(s) L298 - L301
DOI http://dx.doi.org/10.1051/0004-6361:20000059

A&A 365, L298-L301 (2001)
DOI: 10.1051/0004-6361:20000059

First XMM-Newton observations of an isolated neutron star: RX J0720.4-3125

F. Paerels1, K. Mori1, C. Motch2, F. Haberl3, V. E. Zavlin3, S. Zane4, G. Ramsay4, M. Cropper4 and B. Brinkman5.

1  Columbia Astrophysics Laboratory, Columbia University, 550 West 120th St., New York, NY 10027, USA
2  Observatoire Astronomique, CNRS UMR 7550, 11 rue de l'Université, 67000 Strasbourg, France
3  Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany
4  Mullard Space Science Laboratory, University College London, Holmbury St. Mary, Dorking, Surrey, RH5 6NT, UK
5  SRON Laboratory for Space Research, Sorbonnelaan 2, 3584 CA Utrecht, The Netherlands

(Received 3 October 2000 / Accepted 26 October 2000)

We present the high resolution spectrum of the isolated neutron star RX J0720.4-3125, obtained with the Reflection Grating Spectrometer on XMM-Newton , complemented with the broad band spectrum observed with the EPIC PN camera. The spectrum appears smooth, with no evidence for strong photospheric absorption or emission features. We briefly discuss the implications of our failure to detect structure in the spectrum.

Key words: stars: atmospheres -stars: individual (RX J0720.4-3125) -stars: neutron -X-rays: stars

Offprint request: F. Paerels

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