A Possible Detection of Occultation by a Proto-planetary Clump in GM Cephei

The YETI Collaboration, W. P. Chen, S. C. -L. Hu +41

GM Cep in the young (~4 Myr) open cluster Trumpler 37 has been known to be an abrupt variable and to have a circumstellar disk with very active accretion. Our monitoring observatio…