Spot-Based Measurement of the Brighter-Fatter Effect on a Roman Space Telescope H4RG Detector and Comparison with Flat-Field Data
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
| Veröffentlicht: |
2023
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| _version_ | 1866910387524337664 |
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| author | Malagón, Andrés A. Plazas Shapiro, Charles Choi, Ami Hirata, Chris |
| author_facet | Malagón, Andrés A. Plazas Shapiro, Charles Choi, Ami Hirata, Chris |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_01920 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Spot-Based Measurement of the Brighter-Fatter Effect on a Roman Space Telescope H4RG Detector and Comparison with Flat-Field Data Malagón, Andrés A. Plazas Shapiro, Charles Choi, Ami Hirata, Chris Instrumentation and Methods for Astrophysics 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. |
| title | Spot-Based Measurement of the Brighter-Fatter Effect on a Roman Space Telescope H4RG Detector and Comparison with Flat-Field Data |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2310.01920 |