Potential detrend correlations

[SCO]

How does AstroImageJ handle detrend correlations?  For example, detrend parameter X-Width_T1 would likely be strongly correlated with detrend parameter Y-Width_T1.  Airmass would likely correlate (to a far lesser extent and less predictably) to FWHM_T1.  Other detrend parameters are completely independent of each other.  How extensive is the logic that AstroImageJ uses to assess such potential correlations and correct for each one appropriately?

[karenacollins]

The user may select any desired detrend parameter. If detrend optimization is used, it selects up to N justifiable detrend parameters based on the Bayesian information criterion, where N is set by the user in "Max Detrend Pars" and BIC threshold to justify an additional parameter is set in "Min BIC Thres", which should normally be set to "2". I wouldn't generally allow more than N=1 detrend parameters unless you have more baseline that the transit duration, and then maybe allow up to 2.

[SCO]

Sounds good.  Thanks!