Optical and X-ray studies of 2A 1822-371

Details Optical and X-ray studies of 2A 1822-371 Optical and X-ray studies of 2A 1822-371

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...241.1148c&link_type=abstract

Astrophysical Journal, Part 1, vol. 241, Nov. 1, 1980, p. 1148-1152. Research supported by the Science Research Council of Engl

Astronomy and Astrophysics

Astronomy

11

Optical Emission Spectroscopy, Ultraviolet Astronomy, X Ray Spectra, X Ray Stars, Binary Stars, Ubv Spectra

Scientific paper

Optical spectroscopy in the 3400-5000 A band of the counterpart of 2A 1822-371 obtained at CTIO is presented. This very-ultraviolet object (V = 15.3, U-B = -0.9) displays the C III/N III 4640-4650 A complex and He II 4686 A, together with two broad emission features in the UV at 3765 and 3815 A. The paper discusses the identification of these features and suggests they are due to O III and He II. The photographic plate material enables a refinement of the Seitzer et al. binary period to 5.5704 + or - 0.0003 hr. The X-ray spectrum of this object obtained by Ariel 5 is best fitted by a 2.4 keV blackbody spectrum.

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