Abstract
Abstract
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.
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