Abstract
view Abstract Citations (68) References (24) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Discovery of 3.9 Hour Periodic Dips in the X-Ray Intensity of XB 1254-690 Courvoisier, T. J. -L. ; Parmar, A. N. ; Peacock, A. ; Pakull, M. Abstract The low-mass X-ray binary XB 1254 - 690 has been discovered to show irregular dips in X-ray intensity that recur with a period of 3.9 hr consistent with the optical period derived independently. The spectral changes observed during dipping are complex and can be successfully described using a two-component model. One of these components may be X-rays scattered into the line of sight by an accretion disk corona. In contrast to other X-ray dipping sources for which the metallicity has been measured, the abundance of the material responsible for the dips is close to that of cosmic material. Publication: The Astrophysical Journal Pub Date: October 1986 DOI: 10.1086/164598 Bibcode: 1986ApJ...309..265C Keywords: Variable Stars; X Ray Binaries; X Ray Spectra; Accretion Disks; Exosat Satellite; Light Curve; Metallicity; Neutron Stars; Astrophysics; STARS: INDIVIDUAL ALPHANUMERIC: XB 1254-690; X-RAYS: BINARIES full text sources ADS | data products SIMBAD (3)
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