Figure 1
The effect of varying the image quality threshold parameter for the survey IAM data. The default value of 127 (left-hand side) is clearly unsatisfactory near bright stars, however by selecting 2048 (right-hand side), the new MASH-II PN MPA1700-5136 is recovered (filled ellipse).

The effect of varying the image quality threshold parameter for the survey IAM data. The default value of 127 (left-hand side) is clearly unsatisfactory near bright stars, however by selecting 2048 (right-hand side), the new MASH-II PN MPA1700-5136 is recovered (filled ellipse).

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