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Table A.1.
Interpretation of fieldGrade.
| Grade | Requirements |
|---|---|
| A++ | Seeing≤ 1.25″ |
| standard deviation with respect to Pan-STARRS stdps < 0.04 | |
| A+ | Seeing≤ 1.5″ |
| standard deviation with respect to Pan-STARRS stdps < 0.04 | |
| A | Seeing≤ 2.0″ |
| standard deviation with respect to Pan-STARRS stdps < 0.04 | |
| B | Seeing≤ 2.5″ |
| standard deviation with respect to Pan-STARRS stdps < 0.05 | |
| C | Seeing≤ 2.5″ |
| standard deviation with respect to Pan-STARRS stdps < 0.08 | |
| D | Seeing > 2.5″ |
| or ellipticity > 0.3 | |
| or number of stars for Pan-STARRS comparison < 100 | |
| or limiting magnitude (5σ): i > 19, Hα > 19, r > 20, g > 20 | |
| or moon separation < 20° | |
| or strong photometric difference in Hα within field pair | |
| (>98 percentile for total field distribution). | |
| or manually graded as D through visual inspection of the image. |
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