That last burst looks just like another background burst,
not too-GC-like time and energy distributions: looks like
radioactivity with a couple of single muons superimposed
(or perhaps inter-SM muons with partners in SM's whose
buffers hadn't read out yet).
In case you were wondering why there were TWO messages: this is
actually expected behavior of the monitor. The combined burst
search actually goes over the same period of time several times,
as subsequent supermodules read out, with different numbers of
supermodules present. If it finds a burst within 30 seconds
of a burst it has already found, then it sends a second (or third,..)
alarm ONLY if 1. a greater number of SM's were present for the search
AND the Poisson prob. of the burst was lower
OR 2. the Poisson prob. of the second burst was MUCH lower
( .01 smaller than the prob. of the first I think.)
It looks like #1 was the case here.
Erik got the beeps at 6:00 am -- I talked to him over the computer
and am posting this here so he can get some sleep!
I'll post more later.