of H$\alpha$+\[N[ii]{}\] flux to units of ergs$^{-1}$cm$^{-2}$ were found in descriptors of the FITS files. Additionally, we checked the calibration using the integrated H$\alpha$+\[N[ii]{}\] fluxes of NGC 5585 measured in @james2004 and @kennicutt2008.

These data were used for identification and selection of star formation regions.

  ---------- ----------- ------- --------- ------------- ---------- ------------ ------------ ------- ------------------ -----------------
    Galaxy      Type      $B_t$   $M_B^a$   Inclination      PA      $R_{25}^b$   $R_{25}^b$    $D$    $A(B)_{\rm Gal}$   $A(B)_{\rm in}$
                          (mag)    (mag)     (degree)     (degree)    (arcmin)      (kpc)      (Mpc)        (mag)              (mag)
      1           2         3        4           5           6           7            8          9            10                11
   NGC 628     SA(s)c     9.70    –20.72         7           25         5.23         11.0       7.2         0.254              0.04
   NGC 3184   SAB(rs)cd   10.31   –19.98        14          117         3.79         11.3      10.2         0.060              0.02
   NGC 3726    SAB(r)c    10.31   –20.72        49           16         2.62         10.9      14.3         0.060              0.30
   NGC 5585    SAB(s)d    10.94   –18.73        53           34         2.13         3.5        5.7         0.057              0.38
   NGC 6946   SAB(rs)cd   9.75    –20.68        31           62         7.74         13.3       5.9         1.241              0.04
  ---------- ----------- ------- --------- ------------- ---------- ------------ ------------ ------- ------------------ -----------------

$^a$ Absolute magnitude of a galaxy corrected for Galactic extinction and inclination effects.\
$^b$ Radius of a galaxy at the isophotal level 25 mag/arcsec$^2$ in the $B$ band corrected for Galactic extinction and inclination effects.\

Selection of young star clusters 