ROSAT High Resolution Imager Observations of PSR 0656+14
Abstract
We have used the High Resolution Imager (HRI) on ROSAT to image PSR 0656 + 14 at soft X-ray energies. With a net observing time of 10,326 s, we obtained a source event rate of 0.382 +/- 0.007 counts/s. Comparing the radial distribution of these counts between 15 and 100 arcsec to an empirically derived point spread function for HRI soft sources, we find no evidence of a spatially extended X-ray nebula to a limiting surface brightness of 1.67 x 10 exp -6 counts/s/sq arcsec, corresponding to a limit of 14 percent of the observed flux out to a radius of 100 arcsec. The X-ray emission of the pulsar is pulsed at the 0.385 s period of the radio pulsar, with a pulse fraction of 7 +/- 2.2 percent and a FWHM of 0.10 s. We discuss some models of the X-ray radiation of PSR 0656 + 14 compatible with both the HRI and PSPC results.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- September 1993
- DOI:
- 10.1086/173128
- Bibcode:
- 1993ApJ...414..867A
- Keywords:
-
- Astronomical Photography;
- Pulsars;
- Satellite Imagery;
- Spaceborne Photography;
- X Ray Sources;
- Astronomical Models;
- High Resolution;
- Image Resolution;
- Nebulae;
- Radial Distribution;
- Rosat Mission;
- X Ray Spectra;
- Astrophysics;
- STARS: PULSARS: INDIVIDUAL ALPHANUMERIC: PSR 0656;
- 14;
- STARS: NEUTRON;
- X-RAYS: STARS