Hi everyone,
I am solving a set of images containing one particular star that should be in one specified pixel in all of my images.
After solving, I am plotting the X and Y position of that star(in pixel coordinates).
(I know RADec coordinates of that star, and I am using wcs to convert it to pixel position).
Depending on a chosen set of index files, I am seeing the different distribution of that star in pixel position.
The first image(11.png) is when I let
astrometry.net choose the best index file(from 42xx series) to solve for every image. We can observe two distributions in X(top panel) coordinates.
The second image(12.png) is when I fixed solving with only one index file(4210).
We don't see two distributions anymore, so I am guessing it was due to astrometry solving with different index files.
The third plot(13) is made when I am using different index files(41xx series).
Now we see some sort of wave-like behavior.
I want distribution of that star to be as narrow as possible.
What do you think I can do?
BR
Toni