Re: Light curve model used?

Posted by SCO on Jan 03, 2022; 7:14pm
URL: http://astroimagej.170.s1.nabble.com/Light-curve-model-used-tp1710p1716.html

Thanks TNS for your offer of help.  As far as I know (which I admit is fairly limited at this point), there are two ways to draw a smooth graph based on emperical data; either do a simple chi squared analysis on it (very similar to least squared, but for nonlinear data), or use a model such as the one proposed by Mandel & Agol and adjust the parameters until the model fits the data points as closely as possible.  I prefer the second approach as the light curve would then be much more dependable.  Nevertheless, it is the more difficult of the two approaches.  I cannot see what AstroImageJ is doing under the covers, so I posted this question.  From the responses so far it sounds like AstroImageJ is taking the second approach based on the Mandel & Agol model.