This is cropped from the center of a siril stacked image of NA nebular. The image has distinct red bands running from the lower left to the upper right. The camera is a canon M1. The images used were 40 images of 50 seconds each.
The lighter area on the left is part on NA, the darker area is the gap between NA and Deneb (cropped up and right).
I have 30 darks and 30 biases that were not included in the processing. Are these artifacts due to not including darks and biases.