There seems to be something happening inside this starburst. There are 3 stars visible on SDSS at top and maybe even at bottom. Looks like supernovae???
by Budgieye moderator
The three blue area are starforming areas. Supernova are brighter, and usually green in SDSS.
Supernova are blue or green http://talk.galaxyzoo.org/#/boards/BGZ0000001/discussions/DGZ0000wrb?page=4&comment_id=53d8b997db90c7673f00101d