Notes on coincidence segments:

For any of the lists, the first four columns have the same format as for the
single-interferometer lists: segment number, start time, end time, and
duration.  That is followed by the contributing segment indexes from each
interferometer, then the bad-flag masks from each interferometer, then the
list of all the bad-flag names, with the interferometer code prepended.
For example, the last line of S2H1H2v01_segs.txt is:

  413  734373841  734377425   3584  222  418          1          1 H1:OUTSIDE_S2 H2:OUTSIDE_S2

This double-coincidence segment is made up of H1 segment 222 and H2
segment 418, and the "OUTSIDE_S2" bad-flag is on for both of them.
Note that the double- and triple-coincident segments, as defined
here, do not have a minimum length requirement (though the single-ifo
segments which make them up have a 60-second minimum duration).

P. Shawhan 5/7/03