Table 3: Photometry of selected extended sources.
Source Size TDT Filter Integrated Correction Integrated
  (arcmin)     Flux Density Factor Flux Density
        (ISOPHOT; Jy)   (IRAS; Jy)a
NGC 6946 $9 \times 7$ 05302402 C60 $111.5 \pm 6.5$ 1.45 146.5
NGC 6946   05302401 C200 $365.8 \pm 11.7$ 1.11 -
M 51b $9\times 6$ 17200618 C60 $ 70.3 \pm 3.0$ 1.30 84.9
M 51b   17200618 C100 $162.2 \pm 12.3$ 1.33 192.6
M 51b   17200820 C160 $180.9 \pm 23.9$ 1.07 -
M 101 $21 \times 10$ 16500615 C60 $61.1 \pm 3.2$ 1.15 92.9
M 101   16500716 C100 $204.5 \pm 10.2$ 1.12 263.5
M 101   16500716 C160 $360.5 \pm 49.0$ 1.06 -
a From Table 4 of Rice et al. (1988).
b Together with companion galaxy NGC 5195.

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