Polar light march 2015

The left picture was taken during a period of polar light activity of which I was not aware at that time. The PiP shows a picture of M51, taken in the same night. Canon attached to 750 mm telescope, pictures taken in Oberlangen M108 (on top) is a galaxy and M97 is a planetary nebula in "our" galaxy

Reprocessed pictures (three) taken on 17-03-2015. I am now convinced that the reddish background in part of the pictures is in fact caused by the polar light. At that time I didn't realize it was visible in large parts of northern Europe Total exposure 3x60 seconds with ISO 3200