The 35-day Cycle of HZ Herculis
Abstract
Fabian et al.1,2 have reported the detection of X-ray emission from Her X-1 on June 5, 1973, by Copernicus during a predicted ``off'' state of the 34.88-d cycle. Since they have also detected the source on May 16, 1973, during the preceding ``on'' state, they concluded that a substantial change may have taken place in the 35-d period.
- Publication:
-
Nature Physical Science
- Pub Date:
- October 1973
- DOI:
- 10.1038/physci245087a0
- Bibcode:
- 1973NPhS..245...87C