The discovery of an 81 minute modulation of the X-ray flux from 2A0311-227

Details The discovery of an 81 minute modulation of the X-ray flux from 2A0311-227 The discovery of an 81 minute modulation of the X-ray flux from 2A0311-227

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980stin...8112974w&link_type=abstract

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Physics

Flux Density, Magnetic Stars, Quasars, Stellar Spectra, White Dwarf Stars, X Ray Spectra, X Ray Stars, Infrared Spectra, Spectrum Analysis, X Ray Analysis, X Ray Sources

Scientific paper

The X-ray flux from 2A0311-227 was modulated at the 81 min orbital period of its optical counterpart. An absorption dip with NH equivalent to 5 x 10 to the 22nd power H atoms per square cm was observed at magnetic phase 0.42. It was interpreted as the accretion column of a magnetic white dwarf passing in front of the X-ray source. The spectrum was thermal with a temperature of 18 keV and a 300 eV equivalent width iron line at 6.6 keV.

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