Speaker
Description
We present a detailed characterization of a CCD detector system developed for the ADFOSC instrument of the 3.6m DOT. During its development, various experiments were performed in a dark room to tune the CCD controller parameters to obtain optimum performance in single and four-port readout modes. We employed different methodologies for characterizing the performance parameters of the CCD, including bias stability, noise, defects, linearity, and gain. The CCD has grade-0 characteristics at temperatures close to operating temperature ($-120^\circ$C). The overall system is linear with a regression coefficient of 0.9999, readout noise of 6 electrons and a gain value close to unity. We introduced a new method to calculate the dark signal using the gradient seen in the bias frames at temperatures below $-35^\circ$C. Using the optimized setting, we verified the performance of the CCD detector system on-sky using the ADFOSC instrument mounted on 3.6m telescope. Later, we observed specific science targets and transients to evaluate the detector's performance in both imaging and spectroscopic modes.
| Presentation type | Oral |
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