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Still have to use Maxim for camera control.
Juan, desgraciadamente las he registrado con PixInsight, lo he probado de las dos formas, con StarAlignment y manualmente con DynamicAlignment, lo he probado con las imágenes lineales, con las imágenes estiradas, de todas las formas posibles y nada de nada, lo he probado con otros programas y el resultado es el mismo.
It's not really unfortunate. I'm sure Juan will enjoy the challenge of sorting this one out. The weird part is that it is not uniform over the whole region. The fact that other software packages give the same result suggests it must be something inherent in the images.
Here is a quote from the StarAlignment documentation:
This initial step is a critical part of the image registration task. If stars are not detected accurately, the whole process will fail, or it will perform unreliably.
Could it be that something in one of the component frames is preventing accurate star detection in the centre region. I say one, because it seems to me that two of your frames register correctly and one doesn't.
Nice color palette application and nice image.
What have you used to register the images? There seem to be serious image registration errors, especially on the central area. I hope you haven't used PI for this task, or otherwise I'd be very interested in knowing what happened.
If you didn't register the images with PI as I suspect, then I strongly encourage you to redo the whole data set with an application able to register images accurately.