Since I have the same problem (EXCEPTION_ACCESS_VIOLATION (0xc0000005)) and you don't get the logs you have asked for, I can post mine and hope they help.
I'm on Windows 7 Pro x64
Java x64: build 1.7.0-b147
Tekkitlauncher: v 1.0.1.3
The “forced shutdown” of minecraft + launcher happens at random places ingame and time, between 5 min and around an hour.
I have five log-files and since I don't understand them, I have uploaded the two latest. I had a few crashes yesterday so I think launcher_1.log is the most informative.
launcher_0.log: http://pastebin.com/d31q70ve
launcher_1.log: http://pastebin.com/mFEEG9iS