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Table A.1.

Integrated flux densities for our galaxy sample in this paper, listed by increasing central wavelength.

NGC 5194 (M 51a) NGC 5195 (M 51b) M 51
Instrument Band λeff Pixel scale Flux density Flux density Flux density
[μm] [arcsec] [Jy] [Jy] [Jy]
GALEX FUV 0.154 3.2 0.118 ± 0.006 0.002 ± 0.001 0.119 ± 0.006
GALEX NUV 0.227 3.2 0.194 ± 0.005 0.005 ± 0.001 0.198 ± 0.006
SDSS u 0.359 0.45 0.488 ± 0.006 0.074 ± 0.001 0.537 ± 0.007
SDSS g 0.464 0.45 1.354 ± 0.011 0.278 ± 0.002 1.603 ± 0.013
SDSS r 0.612 0.45 2.160 ± 0.017 0.584 ± 0.005 2.702 ± 0.022
KPNO Hα 0.657 0.3 2.943 ± 0.230 0.470 ± 0.148 3.450 ± 0.023
SDSS i 0.744 0.45 2.571 ± 0.018 0.876 ± 0.006 3.641 ± 0.025
SDSS z 0.89 0.45 3.060 ± 0.024 1.110 ± 0.009 4.197 ± 0.034
2MASS J 1.235 1.0 3.538 ± 0.099 1.659 ± 0.046 5.571 ± 0.156
2MASS H 1.662 1.0 3.828 ± 0.107 2.050 ± 0.057 5.754 ± 0.161
2MASS Ks 2.159 1.0 3.446 ± 0.097 1.660 ± 0.046 5.295 ± 0.148
WISE W1 3.352 1.37 2.368 ± 0.069 0.885 ± 0.026 3.260 ± 0.095
IRAC I1 3.508 0.75 2.515 ± 0.075 0.879 ± 0.026 3.405 ± 0.102
IRAC I2 4.437 0.75 1.608 ± 0.048 0.561 ± 0.017 2.286 ± 0.069
WISE W2 4.603 1.37 1.408 ± 0.048 0.516 ± 0.018 2.076 ± 0.071
IRAC I3 5.628 0.6 5.146 ± 0.154 0.666 ± 0.020 5.894 ± 0.177
IRAC I4 7.589 0.6 12.899 ± 0.387 1.037 ± 0.031 14.476 ± 0.434
WISE W3 11.56 1.37 8.520 ± 0.392 0.851 ± 0.039 9.837 ± 0.452
WISE W4 22.09 1.37 13.167 ± 0.737 1.578 ± 0.088 15.164 ± 0.849
MIPS 24 23.21 1.5 11.859 ± 0.593 1.537 ± 0.077 13.546 ± 0.677
MIPS 70 68.44 4.5 128.945 ± 12.895 16.338 ± 1.634 144.489 ± 14.449
PACS 70 68.92 2.0 174.587 ± 12.221 22.356 ± 1.565 205.312 ± 14.372
MIPS 160 152.6 9.0 391.906 ± 47.029 28.822 ± 3.459 431.668 ± 51.800
PACS 160 153.9 4.0 403.318 ± 28.232 28.642 ± 2.005 429.377 ± 30.056
SPIRE PSW 247.1 6.0 189.055 ± 10.398 12.765 ± 0.702 197.990 ± 10.889
SPIRE PMW 346.7 8.0 77.370 ± 4.255 5.109 ± 0.281 79.276 ± 4.360
SPIRE PLW 496.1 12.0 26.061 ± 1.433 1.697 ± 0.093 25.907 ± 1.425

Notes. The bands not used in our modelling are indicated in boldface.

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