Andor iKon-L problem with risen and irregular background is visible mostly in the upper-right corner but also in the upper-left corner, near the top edge and in the large area bottom-right from the image center.

Stellar spectrum before appearance of the problem:

bias spectrum

First stellar spectrum with risen and irregular background at CCD temperature -85 deg C:

bias spectrum

Another stellar spectrum with risen and irregular background at CCD temperature -85 deg C:

bias spectrum

Stellar spectrum with risen and irregular background after changing CCD temperature to -75 deg C:

bias spectrum

All files:

all files

Page last modified on May 07, 2015, at 03:16 PM