Upper Limit on 2.5-SECOND Pulsations from Hercules X-1
Abstract
No pulsed power is detected with a period of 2.5 seconds in the 1972 January Uhuru observations of Her X-1. An upper limit of 7 percent is derived for the amount of 2.5-s pulsed modulation relative to the observed amount of 1. pulsed modulation (corresponding to an upper limit of 5 X 1(h for the ratio of signals in the power spectrum). Subject headings: binaries - collapsed stars - neutron stars - pulsation - X-ray sources
- Publication:
-
The Astrophysical Journal
- Pub Date:
- March 1974
- DOI:
- 10.1086/181425
- Bibcode:
- 1974ApJ...188L..35A