The Latest Results from ChAOS
During the pre-dawn twilight and evening hours of 5 August 1996 using
the Apache Point 3.5m telescope,
ChAOS acheived its best performance to date. Modifications to ChAOS which gave
the improvement in performance included the addition of a fast tip-tilt tracker to
compensate for telescope vibrations and the installation of an
"offset box" which allows us to better control the figure of the
deformable mirror, in effect, increasing its dynamic range. The following is a
sample of the images we obtained.
This set of images shows the performance of the system Open Loop, Closed
Loop with the science camera operating in the V band, and Closed Loop with
the science camera operating in the I band. The science camera is an off-the-shelf SBIG
camera. Exposure times were all 1.5 sec and all scaling is identical between images. The improvement factor of core height
between the Open Loop and Closed Loop (I Band) images is 14. The FWHM of
the Closed Loop (I Band) image is 0.14 arcsec. The seeing was 0.9 arcsec.
These images show the performance of ChAOS observing a 0.2" binary star.
As in the Gamma Cyg data, these pictures are taken with an SBIG camera and show Open Loop, Closed Loop (V Band)
and Closed Loop (I Band) data. Exposure times for all images were 20 seconds and
all scaling is identical between images.
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