A Search for Millisecond Pulsars at Galactic Latitudes

We have detected 12 new pulsars, including four of the short-period "recycled" variety, in a survey using the Arecibo radio telescope at 430 MHz. The survey covered 680 square degrees at right ascensions 21 h through 02 h , declinations +7 ffi through +30 ffi . Most of the region falls between galactic latitudes \Gamma20 ffi and \Gamma50 ffi . The minimum detectable flux density for long-period pulsars was approximately 0.5 mJy for declinations +14 ffi ! ffi ! +23 ffi , rising to 0.7 mJy at the declination extremes. For periods P ! 100 ms the minimum detectable flux density increased with decreasing period, especially for large dispersion measures; at P = 1:5 ms and DM = 10 cm \Gamma3 pc the detection threshold was about 10 mJy. Only one previously known pulsar lay within the search region, and it was detected easily. The newly discovered short-period pulsars include two isolated objects: PSR J2322+2057 (P = 4:81 ms, DM = 13 cm \Gamma3 pc), and PSR J2235+1506 (P = ..