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Evidence for 4.4 hour periodic dips in the X-ray flux from 4U 1755-33.

Parmar, A. N.; White, N. E.; Kahn, S. M. +3 more

The paper reports the discovery by the EXOSAT Observatory of three equally spaced dips in the flux from 4U 1755 - 33 that suggest the binary period of this system to be 4.4 hr. The duration of each dip is of order 30 minutes with considerable variability within each event on time scales between 30 and 600 s. The variations are spectrally independe…

The detection of X-rays from nova MUSCAE 1983 with the EXOSAT satellite.

Beuermann, K.; Krautter, J.; Oegelman, H.

Nova Muscae 1983, a fast classical nova, was discovered on January 18, 1983, by Liller (1983). The present investigation is concerned with a study of this star on the basis of X-ray observations which have been conducted with the low- and medium-energy detectors of the Exosat satellite on April 20, 1984. The measured data are combined with other m…

Feige 24 : wind : flare accretion by a hot DAZ1 degenerate.

Sion, E. M.; Starrfield, S. G.

Model stellar envelopes have been constructed in order to represent the outer layers of the hot DAZ white dwarf component of the spectroscopic binary Feige 24. The results of the calculations show that the metals, discovered by Dupree and Raymond (1983) should diffuse rapidly into the interior unless a continuous source of these elements is presen…