The 34.85-Day Cycle of Her X-1
Open Access
- 1 October 1974
- journal article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 169 (1), 27P-30P
- https://doi.org/10.1093/mnras/169.1.27p
Abstract
A 5$$\frac12$$-day observation of Her X-1 is reported. At 05h 30m UT, 1974 April 26 we observed the turn-on from the extended low of cycle 24. The turn-on of cycle 27 did not occur during a 1$$\frac34$$-day observing period in 1974 August. It is concluded that the basic 34d.85 cycle is not precisely predictable on the data so far available.