Investigating bright Fermi-LAT pulsar-like unassociated sources

The past five years have been a bonanza for millisecond pulsar searchers, with the number of known field MSPs tripling in that time. A major driver of these discoveries has been the availability of accurate positions and spectra of gamma-ray sources from the Fermi Large Area Telescope. However, nineteen bright, high-latitude sources with pulsar-like spectra have been observed five or more times in the radio by the Fermi Pulsar Search Consortium with no clear detection of pulsations. We look in depth at the spectral properties of several of these sources, comparing three spectral models (PowerLaw, LogParabola, and PLExpCutoff) to see how strongly the gamma-ray emission supports the pulsar hypothesis.