WW HOROLOGII - X-RAY AND OPTICAL OBSERVATIONS

Citation
Af. Tennant et al., WW HOROLOGII - X-RAY AND OPTICAL OBSERVATIONS, Monthly Notices of the Royal Astronomical Society, 271(3), 1994, pp. 733-736
Citations number
21
Categorie Soggetti
Astronomy & Astrophysics
ISSN journal
00358711
Volume
271
Issue
3
Year of publication
1994
Pages
733 - 736
Database
ISI
SICI code
0035-8711(1994)271:3<733:WH-XAO>2.0.ZU;2-1
Abstract
The eclipsing AM Herculis binary WW Hor (EXO 023432-5232.3) was observ ed in the X-ray band with the ROSAT satellite and in the optical band with the 3.9-m telescope of the Anglo-Australian Observatory. A clear eclipse is seen in the X-ray light curve of this system for the first time. The relative location of the X-ray eclipse suggests that the acc retion pole on the white dwarf surface has migrated in the last few ye ars, consistent with the optical data. The 0.2-2 keV spectrum is well fitted with an absorbed power-law model. There is no indication of a s oft blackbody component, although such a component could be masked by the absorption. The X-ray luminosity of the system in the 0.2-2 keV ba nd is 1.0 x 10(31) erg s(-1).