EXOSAT observations of H2215 - 086 - Detection of the X-ray pulse period

Details EXOSAT observations of H2215 - 086 - Detection of the X-ray pulse period EXOSAT observations of H2215 - 086 - Detection of the X-ray pulse period

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.210p...7c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 210, Sept. 1, 1984, p. 7P-10P. Research supported by th

Astronomy and Astrophysics

Astronomy

31

Spaceborne Astronomy, Stellar Spectrophotometry, White Dwarf Stars, X Ray Sources, Exosat Satellite, Light Curve

Scientific paper

A 2.8 hr observation of the intermediate polar H2215 - 086 using the Exosat Medium Energy experiment has revealed a strong, quasi-sinusoidal modulation of the hard X-ray flux with a period (20.65 + or - 0.32 min) consistent with, and in phase with, that of the large amplitude optical variations. The detection of this hard X-ray modulation confirms that the optical pulse period represents the white dwarf rotation period in this system. The X-ray spectrum observed is consistent with a hard X-ray source of less than about 4 keV with substantial low energy absorption implying a column density of less than about 7 x 10 to the 22nd per sq cm. At an assumed distance of 500 pc the 2-10 keV X-ray luminosity of H2215 - 086 is about 3.0 x 10 to the 32nd ergs per sec.

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