Table 2
LSST photo-z requirements for the high signal-to-noise “gold sample” subset, which is defined as having i < 25.3.
| Quantity | Requirement | Goal |
|
|
||
| σz / (1 + z) | <0.05 | <0.02 |
| η | <10% | |
| |ez| | <0.003 | |
Notes. The parameters are defined as follows: σz / (1 + z) is the root-mean-square scatter in photo-z; η is the fraction of 3σ outliers at all redshifts; and ez is the bias, defined as the mean of (zp − z) / (1 + z) at a given z, where zp is the photo-z.
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