

But I believe that there is a fundamental difference here.  The other x
three instruments are focusing instruments, that, more or less, form
an image, so positional errors are limited by craft attitude and the 
resolving power of the optics.  BATSE is an altogether different
beast, effectively just 8 coincidence counters, one on each corner of 
the craft.  Positional information is triangulated from the 
differential signal arrival times at each of the detectors.
Positional error would be predominantly determined by timing errors
and errors in craft attitude. Since none of the 8 BASTE detectors have
any independant angular resolution whatsoever, they can not be used to
determine parallax.  Indeed, parallax would just add a very small 
component to the positional error.  

Demonstrating that these puppies are beyond the oort cloud would 
require resolution on the order of arcseconds, since the oort 
cloud is postulated to extend to about 0.5 parsec (all together 
now: "Parallax ARc SECond", a parsec is the distance of an object 
that demonstrates one arc second of parallax with a 2 AU base line).
If the 3 degree accuracy reported above is true, we're going to 
have to add a BASTE to the pluto fast flyby to get enough baseline.

The beauty of BASTE is that it both gives positional information and
watches the entire sky simultaneously, a realy handy combination
when you have no idea where the next burst is coming from.