We present the results from the on-going radio monitoring of recent type II supernovae ( SNe ) , including SNe 2004et , 2004dj , 2002hh , 2001em , and 2001gd .
Using the Very Large Array The VLA telescope of the National Radio Astronomy Observatory is operated by the Associated Universities , Inc. under a cooperative agreement with the National Science Foundation . to monitor these supernovae , we present their radio light-curves .
From these data we are able to discuss parameterizations and modeling and make predictions of the nature of the progenitors based on previous research .
Derived mass loss rates assume wind-established circumstellar medium , shock velocity \sim 10 , 000 km s ^ { -1 } , wind velocity \sim 10 km s ^ { -1 } , and CSM Temperature \sim 10 , 000 K .