Wouldn't the Jedi have known quickly that Mace was dead?
After they kill Mace, Palpatine talks to Anikan about "if the Jedi find out". But lof course they would find out right away, like him missing at the next scheduled council or something... or was there not enough time after that point for a council meeting to have been held... ok come to think of it, how much time had elapsed from when they killed Mace to when order 66 was executed .. was it like hours or days? I don't remember.