Crosstalk Analysis of Suprime-Cam FDCCDs Using Cosmic Rays in Dark Frames

TL;DR

This study quantitatively analyzes crosstalk in Suprime-Cam's FDCCDs using cosmic rays in dark frames, revealing linear correlations and providing a correction method to improve data quality.

Contribution

It introduces a detailed crosstalk analysis for Suprime-Cam FDCCDs and proposes an effective correction procedure based on the linear correlation model.

Findings

Crosstalk coefficient is approximately 10^-4.

Crosstalk occurs not only in corresponding pixels but also in the next pixel but one.

No inter-CCD crosstalk detected.

Abstract

We analyzed the crosstalks in the new full depleted CCDs in the Subaru Prime Focus Camera(Suprime-Cam). The effect is evaluated quantitatively using cosmic rays in dark frames. The crosstalk is well approximated by a linear correlation and the coefficient is ~ 10^-4. The coefficients are not significantly different among the 10 CCDs. We also find that the crosstalk appears not only in the corresponding pixels but also in the next pixel but one. No crosstalk is detected in Suprime-Cam among different CCDs. Based on the analysis, the correction procedure for the crosstalk is presented, and the application to the data is demonstrated.