From spencer Wed Jan 24 09:10:19 1996
From spencer Wed Jan 24 09:10:19 1996
Subject: Io Volcano News
To: oleroemer
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I just received the following from Bob Howell (rhowell@uwyo.edu).
The 1996 Io season is under way!   Bob mentions that the temperature
(on Earth) was -13 F when they went up the mountain to do the 
observing: no doubt this helped their thermal IR sensitivity...


The first Io observations of the new season were obtained at WIRO during the
eclipse of 96/01/23 UT.  They were made with Denver University's long
wavelength "TNT" camera, and mark the beginning our effort to extend the
WIRO observations beyong the 5 micron limit of our earlier work.  The
eclipse was observed at 10, 11, and 18 microns.  A preliminary reduction of
the 11 micron (in-eclipse / out-of-eclipse) flux ratio gives a value of 0.43
+/- 0.04, which is within the typical range expected.  It indicates that no
major enhancement of activity is taking place.  We also observed the
disappearance of the eclipsed Io behind the Jupiter limb and hope to be able
to extract the spatial distribution of 11 micron sources from that
occultation lightcurve.  If so, this will provide a new way of regularly
obtaining long wavelength earthbased flux measurements of discrete hotspots.

Bob Howell, Dimitri Klebe, Michelle Creech-Eakman, and Mary Dahn
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