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Table 2
Transformation equation coefficients for Eqs. (1) and (2) for the different quadrants.
| Quadrant | Zero-point | Color term | N stars | rms | |||
| B | R | B | R | B | R | ||
|
|
|||||||
| Q1 | 27.477 ± 0.012 | 27.371 ± 0.029 | −0.015 ± 0.011 | 0.030 ± 0.006 | 24 | 0.034 | 0.023 |
| Q2 | 27.440 ± 0.013 | 27.361 ± 0.008 | 0.010 ± 0.010 | 0.008 ± 0.006 | 29 | 0.026 | 0.022 |
| Q3 | 27.421 ± 0.028 | 27.197 ± 0.017 | 0.041 ± 0.026 | −0.025 ± 0.014 | 24 | 0.068 | 0.035 |
| Q4 | 27.560 ± 0.011 | 27.326 ± 0.016 | 0.011 ± 0.017 | −0.018 ± 0.014 | 20 | 0.042 | 0.038 |
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