SIMBAD references

We have used a fast folding algorithm to search for radio pulsations at long periods (1-30 s) from 75 unidentified radio sources. These sources were originally identified in the NRAO VLA Sky Survey as radio bright, unresolved, and highly linearly polarized, suggesting that they could be previously undetected pulsars. These targets had been observed with the Green Bank 43 m radio telescope and searched for repeating pulses using standard Fourier techniques as well as for dispersed single pulses. This new search of the data is more sensitive to large periods and small duty cycles than the previous Fourier search. We found no promising signals and extend the flux density limit of the original search of ∼3 mJy to this larger spin period range.