Detrending Airmass

Posted by mtsacobservatory on Aug 06, 2020; 6:07pm
URL: http://astroimagej.170.s1.nabble.com/Detrending-Airmass-tp1437.html

Hello,

We are new users to AIJ, but want to use it with our students to reduce data for delta Scuti stars.  We've done the aperture photometry, but does AIJ automatiaclly make corrections for airmass?  I noticed there's a way to detrend the lightcurve for airmass in Multi-plot.  I tried a detrend for Comp star 1, and I can see the coefficient.  What is reasonable range for this value?  Also, does detrending Comp star 1 automatically apply the correction to the target?  And do we need to detrend multiple comp stars, or is one enough?  Any help would be greatly appreciated.  

Jessica Draper
Mt. SAC Observatory
Walnut, CA