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13.9-MINUTE PERIODICITY IN X PERSEI (=3U 0352 + 30?)
J. B. HUTCHINGS and G. A. H. WALKER
Publications of the Astronomical Society of the Pacific
Vol. 88, No. 525 (October 1976), pp. 754-758
Published by: Astronomical Society of the Pacific
Stable URL: http://www.jstor.org/stable/40676200
Page Count: 5
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Several series of scans at Hβ and β4686 in the spectrum of X Per were obtained with the Image Isocon camera. These have been analyzed (1) for changes on the 13.9-minute period observed in 3U 0352 + 30; (2) for short-period variations over 2 Å intervals in the range 1 minute to ∼ 20 minutes; (3) for longer-term changes. Changes in the 13.9-minute period are seen at the 1% level over ∼ 2 Å in Hβ and λ4686, which are marginally significant. Other changes are seen and discussed.
Publications of the Astronomical Society of the Pacific © 1976 The University of Chicago Press