X-ray spectra of Hercules X-1. III. Pulse phase dependence in the high-energy continuum.
Abstract
We have observed pulse phase-dependent spectral changes in the high-energy (>20 keV) continuum of Hercules X- 1. Cyclotron absorption of underlying continua can reproduce the observed angular dependence in the high-energy cutoff. We discuss implications of this model, which include the possibility of determining the angular separation between the line of sight and the neutron star magnetic field if the absorbing electron spectrum is known. Subject headings: X-rays: binaries - X-rays: bursts - X-rays: spectra
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1978
- DOI:
- 10.1086/156565
- Bibcode:
- 1978ApJ...225..988P
- Keywords:
-
- Astronomical Spectroscopy;
- Pulsars;
- Spectrum Analysis;
- X Ray Astronomy;
- X Ray Spectra;
- Binary Stars;
- Continuous Spectra;
- X Ray Spectroscopy;
- Astrophysics;
- Neutron Stars:X-Ray Pulsars;
- Periods:X-Ray Pulsars;
- Spectra:X-Ray Binaries;
- Spectra:X-Ray Pulsars