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The high-field polar RX J1007.5-2017 | | H.-C. Thomas
; K. Beuermann
; K. Reinsch
; A.D. Schwope
; V. Burwitz
; | | Date: |
13 Sep 2012 | | Abstract: | We report optical and X-ray observations of the high-field polar
RXJ1007.5-2017 performed between 1990 and 2012. It has an orbital period of
208.60 min determined from the ellipsoidal modulation of the secondary star in
an extended low state. The spectral flux of the dM3- secondary star yields a
distance of 790+-105 pc. At low accretion levels, RX{} exhibits pronounced
cyclotron emission lines. The second and third harmonic fall in the optical
regime and yield a field strength in the accretion spot of 94 MG. The source is
highly variable on a year-to-year basis and was encountered at visual
magnitudes between V sim 20 and V sim 16. In the intermediate state of 1992
and 2000, the soft X-ray luminosity exceeds the sum of the luminosities of the
cyclotron source, the hard X-ray source, and the accretion stream by an order
of magnitude. An X-ray high state, corresponding to the brightest optical
level, has apparently not been observed so far. | | Source: | arXiv, 1209.2838 | | Services: | Forum | Review | PDF | Favorites | |
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