All Tables

Table 1: Log of the observations relevant to this paper.
Table 2: Optical broad-band imaging photometric calibration parameters.
Table 3: Averaged local background values for the H II regions of the bar. Values were corrected for Galactic extinction (Schlegel et al. 1998).
Table 4: Column 1: identification number of the H II regions (from the NGC 1530 H II region catalogue, Relaño et al. 2005); Col. 2: decimal logarithm of the H ${\alpha }$ luminosity (in erg s^-1). The errors represent uncertainties in the H ${\alpha }$ luminosity due to the image noise and the uncertainties in the determination of the H II region area (as described in Zurita 2001); Col. 3: decimal logarithm of the H ${\alpha }$ equivalent width of the H II regions; Cols. 4 to 7: $B, V, R, K{\rm s}$ broad band magnitudes of the H II regions corrected for Galactic extinction (Schlegel et al. 1998); Cols. 8 to 11: number of data points used for the determination of the broad band colour in the corresponding band (see Sect. 3.2.3 for more details). The errors in the broad band magnitudes include uncertainties due to the determination of the local background for each H II region (see Sect. 3.2.1 for details), which dominate the error bars. The asterisks highlight the H II regions data which rely on only one measurement of the local background, and which are therefore more uncertain.