The XYCorr () form
plots an error ellipse (or rectangle or other similar figure)
defined by errors in the X and Y directions,
and a correlation between the two errors.
The supplied correlation is a dimensionless value in the range -1..+1 and is equal to the covariance divided by the product of the X and Y errors. The covariance matrix is thus:
[ xerr*xerr xerr*yerr*xycorr ] [ xerr*yerr*xycorr yerr*yerr ]
This plot type is suitable for use with the
<x>_error
and
<x>_<y>_corr
columns in the Gaia source catalogue.
Example XYCorr plot
XYCorr form configuration panel
The configuration options are:
x_y_corr
values
supplied in the Gaia source catalogue.