Journal
ASTRONOMY & ASTROPHYSICS
Volume 378, Issue 1, Pages L5-L9Publisher
EDP SCIENCES S A
DOI: 10.1051/0004-6361:20011151
Keywords
stars : individual : 1RXS J214303.7+065419/RBS 1774; stars : neutron; X-rays : stars
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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 similar to 90 eV and has a low column density, N-H similar to 5 x 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) similar to 23 results in an X-ray to optical flux ratio in excess of 1000.
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