Managed a few nights over the latest new moon under dark skies and one of my targets was the Eagle Nebula, not something I've ever really shot in RGB so I wanted to give it a go.
I've reprocessed this a couple of times from scratch and it keeps coming up so I'm inclined to think it may in fact be real. In amongst some of the fainter Ha regions there is the:
Red - hydrogen alpha emission
Pink/purple - mix of hydrogen alpha/beta
Blue - this was unexpected. It doesn't appear like reflection and there seems to be a gradient from purple towards some bluer areas so I'm thinking that there might be some faint dominant Hb emissions within this region.
Higher Res Link
Has anyone ever spotted this before? I've been looking around the inter webs but I haven't been able to find any confirmation on this.