Characterising the KL4040 sCMOS camera for use on the Boyden 1.5m Telescope

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Abstract
SCMOS sensors have become more popular in astrophysics research due to the lower price and availability versus CCDs, but also due to their fast readout speed and low read noise. However, the technology that sCMOS utilise is different than CCD. Therefore, data processing must be performed differently for sCMOS sensors as compared to CCD data. In this proceedings we report on the testing of the bias and dark current behaviour of the Kepler KL4040 by Finger Lake Instruments for use at the UFS-Boyden Observatory. Bias frames were analysed, and it was found that the mean bias counts increase by ≈ 8.24 percent as the temperature increases from -15 to 10 degrees Celsius. The average standard deviation is only 5 counts, the maximum deviation being only 2.34 percent higher. The average dark current as a function of exposure time was investigated, from 0.1 s to 300 s, at absolute temperatures of -5, -10 and -15◦C and the Dark Signal Non-Uniformity (DSNU) was calculated for each series of dark frames. The rate of the Dark Noise increase clearly shows linear trends for all the temperatures.

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