No one releases data in journals, at least not in astronomy. There are dedicated sites for this, e.g. http://archive.stsci.edu/ http://archive.stsci.edu/ About

No one releases data in journals, at least not in astronomy. There are dedicated sites for this, e.g. http://archive.stsci.edu/ http://archive.stsci.edu/ About the later date: I think it's reasonable that those that put together the proposal and thought up the project have a chance at getting their results out first. Otherwise, why would you go through the effort of planning and executing observations if you could just poach someone else's data as it comes down the pipe? Think of it as a 1-year patent on the research project.