Approx 3,5 hrs of 300s and 600s exposures + some 15s and 30s to "find" the core.
Atik 383l+ color cam and WO 90 mm.
Processed in pixinsight and Photoshop (Photoshop for "cheating" With the core...
).
Larger Version here:
http://www.astrobin.com/240265/