NASA NTRS · 19860045935
H0538 + 608 - A bright AM Herculis-type X-ray source
Abstract
The discovery of an AM Herculis-type magnetic variable, an accreting binary system that contains a magnetic white dwarf and a late-type companion, is reported. The proposed optical counterpart to the detected X-ray source exhibits all the optical emission characteristics of its class: circular polarization, strongly modulated brightness variations, intense flickering on time scales of seconds, historical 'low states', and intense emission lines, including very strong lines of He II. The modulations in the polarization and the photometric magnitude suggest an orbital period of 3.1 + or -0.2 hr.
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Remillard, R. A., Bradt, H. V., Mcclintock, J. E., Patterson, J., Roberts, W.. 1986-03-01. H0538 + 608 - A bright AM Herculis-type X-ray source. https://ntrs.nasa.gov/citations/19860045935
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