The operating system crashes

The timestamps for these logs go from 00:44:26 - 01:11:41. Is this when the crash happened? It might be a good idea to include something from the next boot in case there's some trace of the system attempting to recover from an exception or something. Although, if the system did crash entirely is also possible that no logs have been kept about it.

Do you get any errors if you start with graphics disabled (should appear as an option on the boot menu)?

This is a whole other topic for another day. There's another discussion in this thread that you can read through to get a general idea: