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Charge Diffusion Variations in Pan-STARRS1 CCDs

delete2018-04-16
delete10
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OA
AI
E
E. A. Magnier *
T
Tonry, J. L.
F
Finkbeiner, D.
S
Schlafly, E.
B
Burgett, W. S.
C
Chambers, K. C.
F
Flewelling, H. A.
H
Hodapp, K. W.
K
Kaiser, N.
K
Kudritzki, R. -P.
M
Metcalfe, N.
W
Wainscoat, R. J.
W
Waters, C. Z.
DOI：10.1088/1538-3873/aaaad8delete
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摘要

摘要

En 中文
Thick back-illuminated deep-depletion CCDs have superior quantum efficiency over previous generations of thinned and traditional thick CCDs. As a result, they are being used for wide-field imaging cameras in several major projects. We use observations from the Pan-STARRS 3 pi survey to characterize the behavior of the deep-depletion devices used in the Pan-STARRS 1 Gigapixel Camera. We have identified systematic spatial variations in the photometric measurements and stellar profiles that are similar in pattern to the so-called tree rings identified in devices used by other wide-field cameras (e.g., DECam and Hypersuprime Camera). The tree-ring features identified in these other cameras result from lateral electric fields that displace the electrons as they are transported in the silicon to the pixel location. In contrast, we show that the photometric and morphological modifications observed in the GPC1 detectors are caused by variations in the vertical charge transportation rate and resulting charge diffusion variations.
Keyword:
instrumentation: detectors
surveys
techniques: photometric
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Harvard University
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