Hi William:
I received an answer from John Walker re: the section of the sky from where
the so-called "Oh-My-God Particle" apparently originated.  Here is the full-
text of his reply, unedited:
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 > In your "Oh-My-God Particle," which part of the sky did that particle
 > come from?
Since such particles are detected by "air showers"--the glow of light they
make when they strike the atmosphere, an exact position is not
obtained--only a general direction. The right ascension is 85.2 degrees plus
or minus 0.5 degree (the uncertainty is about the same as the apparent size
of the full Moon), and declination is 48.0 degrees with an uncertainty of
+5.2 degrees and -6.3 degrees [more than *ten times* the full Moon]).
This corresponds to a galactic latitude of 9.6 degrees and a galactic
longitude of 163.4 degrees.
As seen from Earth, this is a point in the northern sky constellation of
Auriga, in the general direction of the bright star Capella.  There is no
obvious source (radio, X-ray, gamma ray, peculiar galaxy) observed in this
region.
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... I appreciate your not breathing while I smoke.
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