ROSAT observations of the radio and gamma-ray pulsar PSR 1706-44.
Abstract
We report on the detection of PSR 1706-44 in two ROSAT-PSPC observations. The recorded source counts are unpulsed with a 2σ pulsed fraction upper limit of 18%. Spectral analysis did not distinguish between black-body and power law models; however, we argue that the lack of pulsations and the similarity in the pulsar's spin parameters to those of the Vela pulsar favour a power law model dN/dE{prop.to}E^-2.4+/-0.6^ and indicate synchrotron emission from a pulsar-powered nebula as the origin of the detected X-radiation. The X-ray flux derived for the power law model is f_x_=3.2^+6.5^_-1.8_x10^-12^erg/s/cm^2^ within the 0.1-2.4keV energy range. An upper limit for the neutron star's surface temperature is put at LogT_s_infinity^~6.03K for a neutron star with a medium stiff equation of state (FP-model with M=1.4Msun_, R=10.85km). Slightly different values for T_s_infinity^ are computed for the various neutron star models available in the literature, reflecting the difference in the equation of state. No soft X-ray emission is detected from the supernova remnant G 343.1-2.3, proposed to be associated with PSR 1706-44.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 1995
- DOI:
- 10.48550/arXiv.astro-ph/9501007
- arXiv:
- arXiv:astro-ph/9501007
- Bibcode:
- 1995A&A...298..528B
- Keywords:
-
- PULSARS: INDIVIDUAL (PSR 1706-44);
- X-RAYS: STARS;
- X-RAYS: ISM;
- STARS: NEUTRON;
- ISM: INDIVIDUAL (G 343.1-2.3);
- SUPERNOVA REMNANTS;
- Astrophysics
- E-Print:
- 7 pages and picture in tared uuencoded and compressed ps-format