We present the measurement and characterization of the brighter-fatter effect (BFE) on a NASA Roman Space Telescope development Teledyne H4RG-10 near-infrared detector using laboratory measurements with projected point sources. After correcting for other interpixel non-linearity effects such as classical non-linearity and inter-pixel capacitance, we quantify the magnitude of the BFE by calculating the fractional area change per electron of charge contrast. We also introduce a mathematical framework to compare our results with the BFE measured on similar devices using autocorrelations from flat-field images. We find an agreement of 18 ± 5% between the two methods. We identify potential sources of discrepancy and discuss future investigations to characterize and address them.

中文翻译：

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罗马太空望远镜 H4RG 探测器上亮胖效应的点测量并与平场数据进行比较

我们使用投影点源进行实验室测量，展示了 NASA 罗马太空望远镜开发的 Teledyne H4RG-10 近红外探测器上亮胖效应 (BFE) 的测量和表征。在校正其他像素间非线性效应（例如经典非线性和像素间电容）后，我们通过计算电荷对比度的每个电子的分数面积变化来量化 BFE 的大小。我们还引入了一个数学框架，将我们的结果与使用平场图像的自相关在类似设备上测量的 BFE 进行比较。我们发现两种方法之间的一致性为 18 ± 5%。我们确定潜在的差异来源，并讨论未来的调查来描述和解决这些问题。