Re: Formatting AIJ Light Curves for Input to EXOFAST
Posted by
karenacollins on
Apr 30, 2019; 8:14am
URL: http://astroimagej.170.s1.nabble.com/Output-an-AIJ-Light-Curve-data-subset-for-input-to-ExoFAST-or-other-global-modeling-tools-tp1109p1138.html
Hi Mark,
If you are running EXOFAST MCMC transit model fits, then you should detrend in EXOFAST as part of that model fit. If you are doing a simple best fit in AIJ for your final result, it's probably fine to also detrend in AIJ. To output data from AIJ to import in
EXOFAST, follow this post:
http://astroimagej.1065399.n5.nabble.com/Formatting-AIJ-Light-Curves-for-Input-to-EXOFAST-td1109.html
You can also export meridian flip data as part of the above process.
In AIJ, if you select a detrend parameter one time, then linear detrending is implemented. If a detrend parameter is selected two times, then quadratic detrending is implemented, etc. It is my understanding that only linear detrending is available in EXOFAST.
Karen
On 4/30/2019 3:06 AM, Mark Salisbury [via AstroImageJ] wrote:
Hi Karen
I have been using AIJ and Exofast extensively over the last few years and I'm very interested to understand a little more why you suggest not detrending the data in AIJ, I presume the preference is to detrend in Exofast? If this is the case is there a way
to extract data columns for other detrend parameters, such as meridian flip, so these can be included in the Exofast detrend as well?
Having read the information on how AIJ undertakes detrending (P13 of your 2017 paper) am I right in understanding the detrending fits are linear only?
Many thanks
Mark Salisbury
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