| dc.description.abstract | Since the late twentieth century, the charge-coupled device becomes the most popular detector which is used in astronomical observations. As time goes on, the semiconductor process technology has developed more mature. The new generation deep depletion CCD has developed successfully as the thickness of the depletion layer is increased. It is insufficient for the related information of the characteristics and performance for new instrument. Therefore, we will research and evaluate further.
In order to research the properties and ability of the new instrument, we use limiting magnitude and fringe pattern to as a reviewable indicator. In observational strategy, we
use the same exposure time to take two images continuously. Because the time interval of the two image is within very short time, we can ignore the changes of the sky condition,
weather, and instrument during the acquisitions of pairs of images. Moreover, we use differential magnitudes method to estimate the limiting magnitude. And utilizing photon
counting to check quality of the observation.
In the results of the theoretical calculation, limiting magnitude is better for deep depletion CCD which is possessed higher quantum efficiency than conventional thinned CCD at z’ band. The difference is about 0.4mag. And the difference of limiting magnitude between theoretical calculation and observation was getting less as wavelength
was getting longer for deep depletion CCD. Due to the atmosphere at longer wavelength regions, the influence from extinction has reduced. Therefore, to use the deep depletion
CCD camera, we can still observe at i’ and z’ band even on poor condition nights and also provide reliable results for observations. Besides, the fringe pattern causes 2.9% and
6.4% photometric errors for the images acquired from conventional thinned CCD camera at i’ and z’ band. And we can not see the effect of fringe pattern in images from deep
depletion CCD camera at any band. Thus, to select deep depletion CCD camera as the observable instrument at i’ and z’ band, it can assure the photometric accuracy.
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