exposuretime: 60 sec
with CCD on -14°C

exposuretime 90sec
with CCD on -14°C

exposuretime: 120 sec
with CCD on -14°C

Erik Bryssinck
12 maart 2001

The herringbones are dissapeared !

Dark-frame before

Dark-frames after the mod.

exposuretime ca: 50 sec.
with CCD on -20°C

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