Table 2: Data for the observed stars in NGC 2506, NGC 6134, and IC 4651. V, B-V are: CCD magnitudes from Marconi et al. (1997) for NGC 2506; photoelectric measurements from Clariá & Mermilliod (1992) for NGC 6134; photoelectric measurements from Eggen (1971), Lindoff (1972), and Jennens & Helfer (1975), as reported in the BDA, for IC 4651. K is taken from 2MASS (Cutri et al. 2003). Stromgren y, b-y are: from Bruntt et al. (1999) for NGC 6134, and Anthony-Twarog & Twarog (2000) for IC 4651. S/N has been measured at about 670 nm. Radial velocities (Col. 8, in km s-1), are heliocentric.
ID V B-V K y b-y S/N RV Phase
NGC 2506
459 11.696 1.100 9.036 - - 110 $+81.62 \pm 0.6$ RGBtip
438 13.234 0.944 10.910 - - 85 $+84.64 \pm 0.3$ clump
443 13.105 0.952 10.791 - - 77 $+84.66 \pm 0.2$ clump
456 13.977 0.919 11.654 - - 35 $+83.68 \pm 0.3$ RGB
NGC 6134
404 12.077 1.310 8.819 12.072 0.841 80 $-24.94 \pm 0.6$ clump
929 12.202 1.273 9.042 12.197 0.811 56 $-25.34 \pm 0.3$ clump
875 12.272 1.268 9.071 12.251 0.820 80 $-25.26 \pm 0.2$ clump
428 12.394 1.284 9.208 12.384 0.820 200 $-26.34 \pm 0.3$ clump
421 12.269 1.314 8.996 12.245 0.838 200 $-25.46 \pm 0.3$ clump
527 - - 9.189 12.359 0.811 200 $-25.19 \pm 0.3$ clump
IC 4651
27 10.91 1.20 - 10.896 0.749 100 $-30.17 \pm 0.6$ clump
76 10.91 1.15 - 10.915 0.708 100 $-29.86 \pm 0.3$ clump
72 10.44 1.32 - 10.371 0.801 100 $-30.82 \pm 0.2$ RGB
56 8.97 1.62 4.660 8.899 1.064 100 $-29.56 \pm 0.3$ RGBtip
146 10.94 1.14 8.340 10.923 0.702 100 $-27.88 \pm 0.4$ clump


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