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.

Gamma Cyg

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.

Delta Equ

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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