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Fast radio bursts (FRBs) are an emerging class of bright, highly dispersedradio pulses. Recent work by Thornton et al. (2013) has revealed a populationof FRBs in the High Time Resolution Universe (HTRU) survey at high Galacticlatitudes. A variety of progenitors have been proposed including cataclysmicevents at cosmological distances, Galactic flare stars, and terrestrial radiofrequency interference. Here we report on a search for FRBs at intermediateGalactic latitudes ($-15^{\circ}$ $< b <$ 15$^{\circ}$) in data taken as partof the HTRU survey. No FRBs were discovered in this region. Several effectssuch as dispersion, scattering, sky temperature and scintillation decrease thesensitivity by more than 3$\sigma$ in $\sim$20\% of survey pointings. Includingall of these effects, we exclude the hypothesis that FRBs are uniformlydistributed on the sky with 99\% confidence. This low probability implies thatadditional factors -- not accounted for by standard Galactic models -- must beincluded to ease the discrepancy between the detection rates at high and lowGalactic latitudes. A revised rate estimate or another strong and heretoforeunknown selection effect in Galactic latitude would provide closer agreementbetween the surveys' detection rates. The dearth of detections at low Galacticlatitude disfavors a Galactic origin for these bursts.

An absence of fast radio bursts at intermediate galactic latitudes