Co-addition of deep ( rms \sim 30 \mu Jy ) 20cm data obtained with the Australia Telescope Compact Array at the location of Spitzer Wide field survey ( SWIRE ) sources has yielded statistics of radio source counterparts to faint 24 \mu m sources in stacked images with rms < 1 \mu Jy .
We confirm that the infrared-radio correlation extends to f _ { 24 \mu { m } } = 100 \mu Jy but with a significantly lower coefficient , f _ { 20 { cm } } = 0.039 f _ { 24 \mu { m } } ( q _ { 24 } = \log ( f _ { 24 \mu { m } } / f _ { 20 { cm } } ) = 1.39 \pm 0.02 ) than hitherto reported .
We postulate that this may be due to a change in the mean q _ { 24 } value ratio for objects with f _ { 24 \mu { m } } < 1 mJy .