During my master thesis I have been working on a project. The professor used a good bunch of my work and included it in a publication. She even requested some of the data at the beginning of the year, which I provided for her. She did not put my name on the publication. The paper has been already published. Is there anything I can do in such case?
Edit: I did not have any publication based on this project. And there is an acknowledgment part, but my name is not there. The data was used for the core of the paper. The ex-supervisor contacted me earlier this year to send her my data, claiming that she lost everything on her hard disk. Then she used all that in the paper. She even put 12 authors on the publication, needless to say, most of them did not contribute. Half of the experimental section and analysis part is my work. I mean even if she didn't want to put my name on it, at least she could have let me know that she is publishing the data.