Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...197.0902m&link_type=abstract
American Astronomical Society, 197th AAS Meeting, #09.02; Bulletin of the American Astronomical Society, Vol. 32, p.1411
Astronomy and Astrophysics
Astronomy
1
Scientific paper
V1432 Aquilae (=RX J1940.2-1025) is the X-ray bright magnetic cataclysmic variable (mCV) whose X-ray modulations at ~12000 s were once thought to belong to the Seyfert galaxy, NGC 6814, ~37' away. These modulations in fact belong to the mCV, and consists of a 12150 s component caused by the spin of the white dwarf, and a 12116.3 s component defined by a narrow eclipse in the optical and the X-rays. However, the cause of this feature, whether it is a true eclipse by the secondary or a dip caused by the accretion stream, has been the subject of debate. We will report the results of an RXTE monitoring campaign performed in 1998 May through August, during which we observed the eclipse 25 times. The eclipse events are deep, consistent with a total lack of X-rays from V1432 Aql for about 600 s; however, the eclipse profile is variable from epoch to epoch. We will discuss the implications of these findings for the model of this mCV. We will also briefly discuss the X-ray variability of NGC 6814.
Hellier Coel
Madejski Greg
Mukai Kazuhiko
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