An extremely bright 10.3 micron source was observed on Jupiter following
the impact of comet fragment "L" using the Goddard Infrared Array Camera
at the ARC Apache Point 3.5-meter telescope.  Because of difficult weather
conditions the source was acquired at 22:42 UT (about 20 minutes after
flux density of about 3000 Janskys (about 5 times the flux density of Alpha
Boo), and appeared to fade over the following hour by about 50%.  The event
was also seen as a dramatic dark spot in visible light at the focal plane
of the 3.5-meter telescope.

Dan Gezari, Drake Deming, Bob Loewenstein, Frank Varosi, Larry Woods