Why does crontab log in as root?

Question

System administration

In auth.log:

pam_unix(cron:session): session opened for user root by (uid=0)
pam_unix(cron:session): session closed for user root

Wherein:

[email protected]:~# crontab -l
no crontab for root

Why is that?

Answer 1

So there is also /etc/cron.* with a bunch of scripts