  We report on a search for steep spectrum radio sources within the 95%
confidence error ellipses of the Fermi unassociated sources from the Large
Array Telescope (LAT). Using existing catalogs and the newly released GMRT
all-sky survey at 150 MHz we identify compact radio sources that are bright at
MHz frequencies but faint or absent at GHz frequencies. Such steep spectrum
radio sources are rare and constitute a sample of pulsar candidates, selected
independently of period, dispersion measure, interstellar scattering and
orbital parameters. We find point-like, steep spectrum candidates toward 11
Fermi sources. Based on the gamma-ray/radio positional coincidence, the rarity
of such radio sources, and the properties of the 3FGL sources themselves, we
argue that many of these sources could be pulsars. They may have been missed by
previous radio periodicity searches due to interstellar propagation effects or
because they lie in an unusually tight binary. If this hypothesis is correct,
then renewed gamma-ray and radio periodicity searches at the positions of the
steep spectrum radio sources may reveal pulsations.
