non-timezoned timestamp column?

How can one make a non-time zoned timestamp column? I tried this:

create table t1 (
ts timestamp not null default 'NOW()',
tt timestamp without time zone not null default 'NOW()'
);

but both come up with a time zone. The docs only refer to "timestamp"
and "timestamp with time zone", so one would assume that the default
is without, but apparently it is not.

I'm using Pg 7.1 on FreeBSD 4.3.

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