Constraints on type Ib/c supernovae and gamma-ray burst progenitors

Chris L. Fryer, Paolo A. Mazzali, Jason Prochaska, Enrico Cappellaro, Alin Panaitescu, Edo Berger, Maurice Van Putten, Ed P J Van Den Heuvel, Patrick Young, Aimee Hungerford, Gabriel Rockefeller, Sung Chul Yoon, Philipp Podsiadlowski, Ken'ichi Nomoto, Roger Chevalier, Brian Schmidt, Shri Kulkarni