Re: Detrending
Posted by karenacollins on Mar 29, 2018; 1:06pm
URL: http://astroimagej.170.s1.nabble.com/Detrending-tp638p988.html
Hi Cliff,
The intended mode is the "user" mode:
However, I see that there is a bug in the current version that is preventing this mode from working properly.
There is a workaround, that is probably easier anyway, since it gives you direct access to multiple parameters. Instead of selecting "user" mode, select the light curve fitting mode (
).
On the light curve fitting panel that opens, deselect the Transit fit:
Then in the Detrend Parameters sub-panel, select a detrend parameter of interest (AIRMASS in the example below), select "Lock", and then enter a "Prior Center" value to use for manual detrending coefficient (and change it up or down as needed). You should see your light curve being affected by the detrend parameter when you change the "Prior Center" (coefficient) value.
The "Fit Statistics" boxes will have a red box around them, which normally means the fit failed to converge. That is okay in the this case since there is actually no fitting being done.
Karen
URL: http://astroimagej.170.s1.nabble.com/Detrending-tp638p988.html
Hi Cliff,
The intended mode is the "user" mode:
However, I see that there is a bug in the current version that is preventing this mode from working properly.
There is a workaround, that is probably easier anyway, since it gives you direct access to multiple parameters. Instead of selecting "user" mode, select the light curve fitting mode (
).On the light curve fitting panel that opens, deselect the Transit fit:
Then in the Detrend Parameters sub-panel, select a detrend parameter of interest (AIRMASS in the example below), select "Lock", and then enter a "Prior Center" value to use for manual detrending coefficient (and change it up or down as needed). You should see your light curve being affected by the detrend parameter when you change the "Prior Center" (coefficient) value.
The "Fit Statistics" boxes will have a red box around them, which normally means the fit failed to converge. That is okay in the this case since there is actually no fitting being done.
Karen
On 3/28/2018 4:46 PM, clkotnik [via AstroImageJ] wrote:
I note that trend coefficient is shown in the Multi-plot Y-data panel for the active trend parameter. The spinner control seems to indicate the coefficient could be changed to an alternate value, but I don't find that possible. Is there a mode that allows for the user to alter the coefficient?
thanks
CliffCliff Kotnik
AAVSO KCLA
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