Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...249l..21s&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor, vol. 249, Oct. 1, 1981, p. L21-L24. Research supported by the Fundacao de
Astronomy and Astrophysics
Astronomy
44
Variable Stars, X Ray Sources, Dwarf Stars, Optical Emission Spectroscopy, Sky Surveys (Astronomy), Spaceborne Astronomy, Stellar Rotation, Stellar Spectrophotometry, X Ray Astronomy, X Ray Spectra
Scientific paper
The X-ray source 4U 1849-31 is identified with the 13 mag star V1223 Sgr, on the basis of a precise HEAO 1 modulation collimator X-ray position uniquely selected by the Ariel-5 sky survey location. It is shown by optical spectroscopy and photometry that V1223 Sgr is a cataclysmic variable, displaying a photometric period of 13.2 min that is interpreted as being due to the rotation of a degenerate dwarf. The similarity of this system to H2252-035 is noted.
Busko Ivo C.
Jablonski Francisco Jose
McHardy Ian M.
Pye John P.
Schwartz Dana A.
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