Table 4: $R_\lambda $ values and relative grain sizes.
Object $R_{\rm B}$ RV RR RI $\frac{<a>}{a_{\rm Gal}}$
(1) (2) (3) (4) (5) (6)
NGC 524 $4.46\pm 0.39$ $3.46\pm 0.16$ $2.21\pm 0.47$ $1.57\pm 0.45$ $1.06\pm 0.02$
NGC 984 $4.19\pm 0.36$ $3.19\pm 0.21$ $2.43\pm 0.19$ $2.06\pm 0.17$ $1.08\pm 0.08$
NGC 1172 $4.25\pm 0.17$ $3.25\pm 0.19$ $2.39\pm 0.19$ $1.95\pm 0.14$ $1.07\pm 0.05$
NGC 1439 $3.45\pm 0.21$ $2.45\pm 0.17$ $2.01\pm 0.15$ $1.76\pm 0.13$ $0.93\pm 0.08$
NGC 2128 $4.37\pm 0.28$ $3.37\pm 0.27$ $2.06\pm 0.29$ $1.59\pm 0.30$ $1.04\pm 0.06$
NGC 2534 $3.03\pm 0.19$ $2.03\pm 0.28$ $1.61\pm 0.30$ $1.18\pm 0.38$ $0.80\pm 0.04$
NGC 2563 - $3.10\pm 0.00$ $2.29\pm 0.74$ $1.19\pm 0.51$ $0.96\pm 0.03$
NGC 2672 $4.27\pm 0.14$ $3.27\pm 0.28$ $2.48\pm 0.14$ $1.77\pm 0.15$ $1.06\pm 0.02$
NGC 2693 $4.46\pm 0.23$ $3.46\pm 0.26$ $2.87\pm 0.45$ $2.59\pm 0.36$ $1.30\pm 0.04$
NGC 2907 $3.25\pm 0.40$ $2.25\pm 0.48$ $1.19\pm 0.29$ $0.49\pm 0.23$ $0.77\pm 0.03$
NGC 2911 $3.84\pm 0.35$ $2.84\pm 0.29$ $1.98\pm 0.31$ $1.13\pm 0.37$ $0.92\pm 0.04$
NGC 3078 $4.10\pm 0.17$ - $2.39\pm 0.19$ - $1.02\pm 0.03$
NGC 3489 $4.38\pm 0.25$ $3.38\pm 0.21$ $2.64\pm 0.19$ $1.70\pm 0.15$ $1.09\pm 0.02$
NGC 3497 - $3.10\pm 0.00$ - $1.53\pm 0.65$ $1.02\pm 0.02$
NGC 3585 $4.45\pm 0.44$ $3.45\pm 0.33$ $3.00\pm 0.24$ - $1.17\pm 0.04$
NGC 3599 $3.49\pm 0.15$ $2.49\pm 0.09$ $2.12\pm 0.06$ $1.57\pm 0.14$ $0.93\pm 0.06$
NGC 3665 $4.29\pm 0.20$ $3.29\pm 0.13$ $2.33\pm 0.23$ - $1.03\pm 0.02$
NGC 3923 $4.16\pm 0.43$ $3.16\pm 0.39$ $2.03\pm 0.16$ - $0.98\pm 0.04$
NGC 4459 $3.94\pm 0.24$ $2.94\pm 0.18$ $2.26\pm 0.16$ - $0.90\pm 0.02$
NGC 5363 $3.78\pm 0.27$ $2.78\pm 0.16$ $2.18\pm 0.36$ $1.89\pm 0.28$ $0.92\pm 0.04$
NGC 5525 $4.15\pm 0.29$ $3.15\pm 0.17$ - - $0.99\pm 0.01$
NGC 5898 $4.15\pm 0.30$ $3.15\pm 0.46$ $2.46\pm 0.29$ $1.84\pm 0.41$ $1.04\pm 0.03$
NGC 5903 $4.07\pm 0.30$ $3.07\pm 0.22$ $2.28\pm 0.39$ $2.01\pm 0.34$ $1.05\pm 0.08$
NGC 7432 $3.89\pm 0.28$ $2.89\pm 0.21$ $2.46\pm 0.19$ $1.94\pm 0.22$ $1.05\pm 0.09$
NGC 7722 $3.89\pm 0.25$ $2.89\pm 0.20$ $2.03\pm 0.14$ $1.78\pm 0.10$ $0.94\pm 0.02$
  RU               $R_{\rm B}$ RV RR RI  
NGC 5485 $4.38\pm 0.24$      $3.65\pm 0.21$ $2.65\pm 0.17$ $1.86\pm 0.12$ $1.40\pm 0.18$ $0.92\pm 0.04$
The Galaxy 4.10 3.10 2.27 1.86 1.00

Notes on Table 4: Cols. (2) to (5) lists the $R_\lambda\ \left[{\equiv}\frac{ A_\lambda}{E(B-V)}\right]$ values with $\lambda= B,~ V,~ R$, and I. Column (6) lists the relative (mean) grain size in the program galaxies with respect to that responsible for the Galactic curve. NGC 5485 represents data in five bands (U, B, V, R and I). For comparison, Galactic $R_\lambda $ values are listed in the last row.

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