  This work verifies the instrumental characteristics of the CCD detector which
is part of the UNI astronomical observatory. We measured the linearity of the
CCD detector of the SBIG STXL6303E camera, along with the associated gain and
readout noise. The linear response to the incident light of the detector is
extremely linear (R2 =99.99%), its effective gain is 1.65 +/- 0.01 e-/ADU and
its readout noise is 12.2 e-. These values are in agreement with the
manufacturer. We confirm that this detector is extremely precise to make
measurements for astronomical purposes.
