1RXS J214303.7+065419/RBS 1774: A New Isolated Neutron Star Candidate

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 Survey 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, $N_H\sim 5\times 10^{20}$ ${cm}^{-2}$. 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.

arXiv commentLaTeX (A&A style files), 5 pages, 3 figures. Accepted for publication in Astronomy and Astrophysics Letters. Minor corrections

References in corpus (10)

• How Common Are Magnetars? The Consequences of Magnetic-Field Decay
• Isolated Neutron Stars: Accretors and Coolers
• X--Ray Spectra from Neutron Stars Accreting at Low Rates
• The Proper Motion, Parallax, and Origin of the Isolated Neutron Star RX J185635-3754
• Optical Observations of the Isolated Neutron Star RX J0720.4-3125
• Optical spectroscopy and photometry of the isolated neutron star RX J1856.5-3754
• Log N -- Log S distributions of accreting and cooling isolated neutron stars
• The Brera Multi-scale Wavelet (BMW) ROSAT HRI source catalog. I: the algorithm
• What is the nature of RX J0720.4-3125?
• The Brera Multi-scale Wavelet (BMW) ROSAT HRI source catalog. II: application to the HRI and first results

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