The input sources for LPV processing are the ones classified as MIRA_SR by the Classification processing (either with nTransits:2+ or with nTransits:20+ classifiers)
which meet the following selection criteria:
a minimum number of 12 data points in the -band.
The maximum number of data points is 238.
The limit on the number of good data points led to the exclusion of several nearby and bright LPVs.
a minimum number of 9 data points in the -band.
a colour mag; (colour computed as median() - median())
a correlation between the -band variability and the colour larger than 0.5 mag.
The correlation is computed using the Spearman algorithm.
a variability amplitude range in larger than 0.2 mag.
The variability amplitude is quantified by the trimmed range (at 95% level).
a minimum Abbe value (von Neumann (1941) and von Neumann (1942)) of 0.8 on the smoothed light curve. The smoothed light curve is computed in an iterative way by merging successive pairs of observations with time difference less than 5 days.