The u'g'r'i'z' Standard Star System:
The Search for Trends
As part of the u'g'r'i'z' standard star setup, a vigorous search for
any trends in the system residuals was made. No obvious trends
were detected. Below are the plots of the system residuals vs. different
quantities which were used in this search. They are gzip-compressed
postscript files; each compressed file is about 100kB in size.
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