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Convolved and re-gridded SFR surface density in NGC 4303. The angular resolution and the grid spacing are the same as our CO data (17′′ and 6′′ ,respectively). The open circle in the bottom left-hand corner indicates the angular resolution of this panel. (Right) The SFE map (color) of NGC 4303

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indicated.

major sources. The total flux density within a radius ofr  1000 (⇡ 950 pc) is found to be S100GHz = 11.3 mJy.
The coordinates of the continuum sources were determined by fitting over a region of diameter 0.00 949 (beamminor axis) centered at the brightest pixel using imfit.
We identified three prominent sources, denoted by C1C3, and their coordinates and peak intensities are given
in Table 4. The sources were identified as regions with• H ó H2 %(Salak+ 20$)highest peak flux densities, where C1 is the str
followed by C2 and C3.
The size of the continuum emission region
lar to those at 4860 and 8460 MHz in Hota &(2005) and 11.3 µm in Siebenmorgen et al. (200brightest compact source at low frequency is altially coincident with source C3 on our image.
estingly, while C3 is the brightest source at 48

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