ROSAT observations of PSR 2334+61 in the supernova remnant G114.3+0.3

Abstract

We report on the observation of PSR 2334+61 in the soft X-ray domain with ROSAT. Assuming a power-law spectrum $dN/dE\propto E^{-\hat{I}\pm }$ with photon-index $\hat{I}\pm =2$ we derive an X-ray flux of $f_x=(7.1\pm 0.2)\times 10^{-14}{erg\; s}^{-1}{cm}^{-2}$ within the $0.1$--$2.4$ keV energy range. An upper limit for the neutron star's surface temperature is put at $T_s^{\infty }\sim 1.2\times 10^6$ K for a neutron star with a medium stiff equation of state (FP-model with $M=1.4$ \Mo, $R=10.85$ km). Slightly different values for $T_s^{\infty }$ are computed for the various neutron star models available in the literature, reflecting differences in the equation of state. No soft X-ray emission is detected from the supernova remnant G114.3+0.3 associated with PSR 2334+61.

4 pages in uuencoded and compressed ps-format, accepted for publication in Astonomy \& Astrophysics