SIMBAD references

We report the results of the observations of the three γ-ray pulsars PSR B0656+14, PSR B1055-52 and PSR B1706-44 performed with BeppoSAX. We detected a pulsed emission only for PSR B1055-52: in the range 0.1-6.5keV the pulse profile is sinusoidal and the statistical significance is 4.5σ. The pulsed fraction was estimated 0.64±0.17. This pulsation was detected also at energies greater than 2.5keV suggesting either a non-thermal origin or a quite high temperature region on the neutron star surface. Spectral analysis showed that only the X-ray spectrum of PSR B1706-44 can be fitted by a single power-law component, while that of PSR B1055-52 requires also a blackbody component (kT=0.075keV) and that of PSR B0656+14 two blackbody components (kT₁=0.059, kT₂=0.12keV).