I am part of a Computer Graphics lab where I got to help a small team already working on a paper, by assimilating/cleaning up some data sets which they required. I was also part of some discussions and shared my views whenever possible trying to help them in analysis phase. I have hardly any other contribution other wise.
Going forward, I am now being offered to be one of the co-authors of the paper. I kind of feel that I haven't really done enough and its almost reaching it's ending stage anyways, so not much chance in future as well.
Other team members are making a point that it won't be just on their part if this work takes up my time even when I don't get to be an author. I am in kind of a moral dilemma as I don't feel my contribution is enough.
Q1. Is just helping out a good enough reason to be a co-author ?
Q2. How do I justify to myself if I have really contributed enough ? Or should I let the team decide if my work is sufficient ?
Q3. In general, are their any tangible points/guideline I can verify my contribution with ?