New pulsars from an Arecibo drift scan search

We report the discovery of the pulsars PSR J0030+0451, PSR J0711+0931, and PSR J1313+0931 that were found in a search of 470 square degrees at 430 MHz using the 305 m Arecibo telescope. The search has an estimated sensitivity for long-period, low dispersion measure, low zenith angle, and high Galact ic latitude pulsars of similar to1 mJy, comparable to previous Arecibo sear ches. Spin and astrometric parameters for the three pulsars are presented a long with polarimetry at 430 MHz. PSR J0030+0451, a nearby pulsar with a pe riod of 4.8 ms, belongs to the less common category of isolated millisecond pulsars. We have measured significant polarization in PSR J0030+0451 over more than 50% of the period, and we use these data for a detailed discussio n of the pulsar's magnetospheric geometry. Scintillation observations of PS R J0030+0451 provide an estimate of the plasma turbulence level along the l ine of sight through the local interstellar medium.