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We present a point-source detection algorithm that employs the second orderSpherical Mexican Hat wavelet filter (SMHW2), and use it on C-BASS northernintensity data to produce a catalogue of point-sources. This catalogue allowsus to cross-check the C-BASS flux-density scale against existing sourcesurveys, and provides the basis for a source mask which will be used insubsequent C-BASS and cosmic microwave background (CMB) analyses. The SMHW2allows us to filter the entire sky at once, avoiding complications from edgeeffects arising when filtering small sky patches. The algorithm is validatedagainst a set of Monte Carlo simulations, consisting of diffuse emission,instrumental noise, and various point-source populations. The simulated sourcepopulations are successfully recovered. The SMHW2 detection algorithm is usedto produce a $4.76\,\mathrm{GHz}$ northern sky source catalogue in totalintensity, containing 1784 sources and covering declinations$\delta\geq-10^{\circ}$. The C-BASS catalogue is matched with the Green Bank6\,cm (GB6) and Parkes-MIT-NRAO (PMN) catalogues over their areas of common skycoverage. From this we estimate the $90$ per cent completeness level to beapproximately $610\,\mathrm{mJy}$, with a corresponding reliability of $98$ percent, when masking the brightest $30$ per cent of the diffuse emission in theC-BASS northern sky map. We find the C-BASS and GB6 flux-density scales to beconsistent with one another to within approximately $4$ per cent.

The C-Band All-Sky Survey (C-BASS): Total intensity point-source detection over the northern sky