Examples:

Assume that 4 data sets have been read in, the first 2 having 100 channels and the last 2 having 50 channels. Assume also that channels 1-10 of all four data sets are ignored and that channels 80-100 of data sets 1 and 2 are ignored.

XSPEC> notice **:1-10    ! The first 10 channels of all 4 data sets are
		           noticed.

XSPEC> notice 80-**      ! An attempt will be made to notice channels
                           80 in all 4 data sets (as that was
                           the last data set range specified) but
                           the result is that only channels 80-100
                           will be noticed for data sets 1 and 2,
                           with no change for data sets 3 and 4 as
                           they have no channels greater than 50.

XSPEC> notice 1:1-5      ! No channels are noticed, as these channels
                           were noticed in the beginning.