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| Space Telescope Science Institute |
| WFC3 Instrument Handbook |
| help@stsci.edu |
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WFPC2 B filter.Figure A.43: Integrated system throughput for F438W.Figure A.44: Point source S/N vs. V+ABν for the F438W filter, assuming high sky backgrounds and a 5×5 pixel aperture.Figure A.45: Extended source S/N vs. V+ABν for the F438W filter, assuming high sky backgrounds and a source uniformly filling a 1 arcsec2 aperture.
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