Scholarlink

<p>High-precision flat-fields correction is essential for precision astronomical photometry, with pixel-to-pixel variation correction playing a key role. This study quantitatively evaluates the temporal stability and spatial uniformity of pixel-to-pixel variations in the Sony IMX455 ZWO ASI6200MM Pro CMOS detector, using flat-fields images observed by mini-SiTian. We developed a pixel-to-pixel variation correction strategy with universal applicability. Our results show that pixel-to-pixel variations are typically <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\sim\)</EquationSource> </InlineEquation>0.365%, with temporal stability better than 0.1% over one year. A stable, time-invariant spatial non-uniformity at the level of <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\sim\)</EquationSource> </InlineEquation>0.006% is also identified. We further investigate the effects of binning, the correlation between the responses of adjacent pixels, and provide a rough comparison with two e2v CCD detectors. This work offers a comprehensive characterization of pixel-level stability in CMOS detectors and delivers strategic insights for future survey projects focused on precision photometric performance.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Spatial uniformity and temporal stability of pixel-to-pixel variation in mini-SiTian CMOS detector

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月20日

查看全文
  • Guozhen Hu,
  • Linying Mi,
  • Kai Xiao,
  • Haibo Yuan,
  • Yang Huang,
  • Jie Zheng,
  • Hong Wu,
  • Min He,
  • Yu Zhang,
  • Shuai Feng,
  • Xiaolu Li,
  • Hongrui Gu,
  • Bowen Huang,
  • Yuanchang Wang,
  • Shuai Xu,
  • Lin Yang,
  • Wenyuan Cui

摘要

High-precision flat-fields correction is essential for precision astronomical photometry, with pixel-to-pixel variation correction playing a key role. This study quantitatively evaluates the temporal stability and spatial uniformity of pixel-to-pixel variations in the Sony IMX455 ZWO ASI6200MM Pro CMOS detector, using flat-fields images observed by mini-SiTian. We developed a pixel-to-pixel variation correction strategy with universal applicability. Our results show that pixel-to-pixel variations are typically \(\sim\) 0.365%, with temporal stability better than 0.1% over one year. A stable, time-invariant spatial non-uniformity at the level of \(\sim\) 0.006% is also identified. We further investigate the effects of binning, the correlation between the responses of adjacent pixels, and provide a rough comparison with two e2v CCD detectors. This work offers a comprehensive characterization of pixel-level stability in CMOS detectors and delivers strategic insights for future survey projects focused on precision photometric performance.