Table 2
Standard stars with their catalogued values and spectral types taken from the literature.
| Star | V | b − y | m 1 | c 1 | Hβ | spectral type |
|
|
||||||
| NGC 869 | ||||||
|
|
||||||
| 782 | 9.450 | 0.268 | –0.053 | 0.150 | 2.618 | – |
| 800 | 12.250 | 0.316 | –0.031 | 0.404 | 2.701 | – |
| 837 | 14.080 | 0.393 | 0.000 | 0.918 | 2.801 | – |
| 867 | 10.510 | 0.393 | 0.161 | 0.375 | 2.613 | – |
| 935 | 14.020 | 0.362 | –0.004 | 0.854 | 2.802 | – |
| 950 | 11.290 | 0.318 | –0.048 | 0.214 | 2.642 | B2V |
| 978 | 10.590 | 0.305 | –0.039 | 0.177 | 2.643 | B2V-B1.5V |
| 980 | 9.650 | 0.290 | –0.054 | 0.167 | – | B1.5V |
| 991 | 11.320 | 0.329 | –0.062 | 0.275 | – | B2V |
| 1015 | 10.570 | 0.225 | 0.033 | 0.741 | 2.772 | B8V |
| 1078 | 9.750 | 0.316 | –0.065 | 0.167 | 2.610 | B1V |
| 1181 | 12.650 | 0.372 | –0.034 | 0.379 | 2.718 | – |
| 1187 | 10.820 | 0.348 | –0.063 | 0.212 | 2.648 | B2IV |
|
|
||||||
| NGC 884 | ||||||
|
|
||||||
| 2005 | 13.560 | 0.35 | –0.013 | 0.713 | 2.750 | – |
| 2139 | 11.380 | 0.255 | –0.033 | 0.196 | 2.649 | B2V |
| 2147 | 14.340 | 0.406 | –0.050 | 1.002 | 2.863 | – |
| 2167 | 13.360 | 0.352 | –0.056 | 0.627 | 2.752 | – |
| 2196 | 11.570 | 0.250 | –0.006 | 0.210 | 2.670 | B1.5V |
| 2235 | 9.360 | 0.316 | –0.088 | 0.150 | 2.611 | – |
| 2330 | 11.420 | 0.267 | –0.050 | 0.277 | 2.640 | – |
| 2572 | 10.020 | 0.311 | –0.091 | 0.197 | 2.620 | – |
|
|
||||||
| NGC 6910 | ||||||
|
|
||||||
| 10 | 10.750 | 0.100 | 0.150 | 1.040 | 2.909 | – |
| 20 | 10.900 | 0.770 | 0.420 | 0.430 | 2.555 | – |
| 24 | 11.720 | 0.660 | –0.140 | 0.220 | 2.647 | B1V |
| 21 | 11.730 | 0.590 | –0.100 | 0.220 | 2.652 | B1V |
| 28 | 12.220 | 0.590 | –0.110 | 0.330 | 2.679 | – |
| 172? | 13.900 | 0.710 | –0.080 | 0.590 | ||
|
|
||||||
| NGC 1502 | ||||||
|
|
||||||
| 30 | 9.650 | 0.475 | –0.096 | 0.157 | 2.628 | B1 V |
| 35 | 10.460 | 0.422 | –0.052 | 0.265 | 2.661 | B3 V |
| 41 | 13.030 | 0.552 | 0.003 | 1.232 | 2.874 | |
| 42 | 12.590 | 0.510 | –0.078 | 0.960 | 2.770 | |
| 45 | 11.460 | 0.475 | –0.065 | 0.526 | 2.723 | |
| 49 | 10.710 | 0.436 | –0.058 | 0.316 | 2.656 | B3 V |
|
|
||||||
| NGC 1039 | ||||||
|
|
||||||
| 267 | 11.960 | 0.303 | 0.138 | 0.481 | 2.678 | |
| 274 | 9.740 | 0.086 | 0.176 | 0.973 | 2.890 | A2.5V |
| 278 | 11.820 | 0.144 | 0.198 | 0.900 | 2.855 | |
| 284 | 10.760 | 0.151 | 0.194 | 0.894 | 2.848 | |
| 294 | 11.220 | 0.176 | 0.204 | 0.796 | 2.817 | |
| 301 | 10.030 | 0.066 | 0.152 | 1.013 | 2.916 | |
| 303 | 9.950 | 0.055 | 0.163 | 1.021 | 2.908 | |
Notes. Photometric data are taken from Crawford et al. (1970) and Johnson & Morgan (1955) for NGC 869 and NGC 884; Crawford et al. (1977) for NGC 6910; Canterna et al. (1979) for NGC 1039, and Crawford (1994) for NGC 1502. Spectral types, when available, are taken from Schild (1965), Slettebak (1968) and Johnson & Morgan (1955) for NGC 869 and NGC 884; Morgan & Harris (1956) and Hoag & Applequist (1965) for NGC 6910; Abt & Levato (1977) for NGC 1039, and Hoag & Applequist (1965) for NGC 1502.
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