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Issue A&A
Volume 378, Number 1, October IV 2001
Page(s) L5 - L9
Section Letters
DOI http://dx.doi.org/10.1051/0004-6361:20011151



A&A 378, L5-L9 (2001)
DOI: 10.1051/0004-6361:20011151

1RXS J214303.7+065419/RBS 1774: A new Isolated Neutron Star candidate

L. Zampieri1, 2, S. Campana3, R. Turolla2, M. Chieregato2, R. Falomo1, D. Fugazza3, A. Moretti3 and A. Treves4

1  Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy
2  Università di Padova, Dipartimento di Fisica, Via Marzolo 8, 35131 Padova, Italy
3  Osservatorio Astronomico di Brera, Via Bianchi 46, 23807 Merate, Italy
4  Università dell'Insubria, Dipartimento di Scienze, Via Valleggio 11, 22100 Como, Italy

(Received 24 July 2001 / Accepted 14 August 2001 )

Abstract
We report on the identification of a new possible Isolated Neutron Star candidate in archival ROSAT observations. The source 1RXS J214303.7+065419, listed in the ROSAT Bright Source Catalogue as RBS 1774, is very soft, exhibits a thermal spectrum well fitted by a blackbody at $T\sim 90$ eV and has a low column density, $N_{\rm H}\sim 5\times 10^{20} {\rm cm}^{-2}$. Catalogue searches revealed no known sources in other energy bands close to the X-ray position of RBS 1774. Follow-up optical observations with NTT showed no peculiar object within the X-ray error circle. The absence of any plausible optical counterpart down to $m_R\sim 23$ results in an X-ray to optical flux ratio in excess of 1000.


Key words: stars: individual: 1RXS J214303.7+065419/RBS 1774 -- stars: neutron -- X-rays: stars

Offprint request: L. Zampieri zampieri@pd.astro.it

SIMBAD Objects



© ESO 2001


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