3.3.6.1  :  Snapshots

This table stores some housekeeping information of the Millennium simulation. In particular, it links redshifts and lookback times to the integer index of the snapshot. Almost all other tables in the various Millennium databases have a snapnum column that corresponds to the one in this table.
columntypefeaturesdescription
snapnuminteger NOT NULLThe order of the snapshot, from 0 to 63 (z=0)
zdoubleNOT NULLThe redshift in full precision
redshiftdecimal(5,2) NOT NULLThe redshift to exactly two decimal places.
lookBackTimefloatNOT NULLThe lookback time in 109 years