Re: Transit Fitting plus referencing software in paper

Posted by karenacollins on Dec 18, 2014; 8:40am
URL: http://astroimagej.170.s1.nabble.com/Transit-Fitting-plus-referencing-software-in-paper-tp199p204.html

Hi David,

The host star parameters shown in the fit panel are tied together by
tables from Allen's Astronomical Quantities 4th edition for "normal"
main sequence stars. There is currently no way to unlock the
relationship between the host star parameter values. The only value that
is really used to calculate the planet radius (Rp) is R*. If you know
R*, enter it directly and ignore the other values. The other values will
not affect the calculation of Rp. Entry of the other values is allowed
simply to provide an estimate of R* from any one of the other
spectroscopic or photometric parameters in the case where R* is not known.

Generally, the first suspect in light curves that show a trend is
airmass. I would try detrending with airmass along with the transit fit.
A second choice would be whatever you use for you time base (i.e.
JD_UTC, etc). It is hard to know beyond that without seeing the actual
data. If you would like for me to suggest specific settings for a
transit dataset you have, you can send the measurements table and plot
config file to me at (~~~karenacollins~~~@~~~outlookDOTcom). The data
would be kept private, and I could send you a suggested setup with an
explanation of any unusual settings.

Karen