|M 81||M 100|
|M 24 m||7.2||E+E||8.8||10.3||G+G||20.1|
|M 70 m||38.8||G+G||6.2||13.2||G+G||12.2|
|P 70 m||27.9||G+G||6.3||n.a.|
|M 160 m||28.5||G+G||0.3||5.14||G+G||3.5|
|P 160 m||26.4||G+G||1.2||n.a.|
|S 250 m||25.2||G+G||0.3||9.5||G+G||7.8|
|S 350 m||10.2||G+G||0.2||5.4||G+G||7.4|
|S 500 m||11.8||G+G||0.2||6.5||G+G||7.6|
Notes. For M 99, the profile fit revealed no central component except at 24 m so we report this in the text. In column (1), M, P and S are MIPS, PACS and SPIRE, respectively, (2) and (5) the core component scale-length in arcseconds, (3) and (6) the best fit functions, E for exponential and G for Gaussian, and (4) and (7) the core component contribution to the total flux in %, respectively for M 81 and M 100. Relative uncertainties on the scale parameters are typically of , while on the core fractions these are typically
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