Identification of the Soft X-Ray Source WGA J1802.1+1804 with a New Magnetic Cataclysmic Variable

Details Identification of the Soft X-Ray Source WGA J1802.1+1804 with a New Magnetic Cataclysmic Variable Identification of the Soft X-Ray Source WGA J1802.1+1804 with a New Magnetic Cataclysmic Variable

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...455l..43s&link_type=abstract

Astrophysical Journal Letters v.455, p.L43

Astronomy and Astrophysics

Astronomy

13

Stars: Binaries: Spectroscopic, Stars: Individual Alphanumeric: Wga J1802.1+1804, Stars: Novae, Cataclysmic Variables, X-Rays: Stars

Scientific paper

We have discovered a bright (V ~ 14.5) cataclysmic variable during observations of the soft X-ray sources in the list of Singh et al. The optical source, which is coincident with the X-ray position of WGA J1802.1+1804, shows all the characteristics of a magnetic AM Herculis--type system: circular polarization, He II strength greater than H beta , multiple line components, and a consistent photometric, polarimetric, spectroscopic, and X-ray period of 113 minutes. The X-ray spectrum shows a dominant soft blackbody (kT = 20--45 eV) and a weaker bremsstrahlung component (kT > 1 keV), while the circular polarization is relatively low (4% in the red).

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