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Table 16

Systematic uncertainty budget for SDSS.

Source u g r i z

PT measurement errora 0.0026 0.0015 0.0013 0.0025 0.0018
PT transformation to 2.5b 0.0029 0.0009 0.0008 0.0009 0.0017
Dispersion around the transformation 0.008 0.007 0.003 0.004 0.004
USNO uniformity 0.0015 0.0010 0.0010 0.0010 0.0010



This is based on the variance of the PT observations.


This is based on the computed statistical error. The error is dominated by the zeropoint offset between the PT and 2.5 m.

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