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- W4280490032 abstract "Abstract It is critical for James Webb Space Telescope (JWST) science that instrumental units are converted to physical units. We detail the design of the JWST absolute flux calibration program that has the core goal of ensuring a robust flux calibration internal to and between all the science instruments for both point and extended source science. This program will observe a sample of calibration stars that have been extensively vetted based mainly on Hubble Space Telescope, Spitzer Space Telescope, and Transiting Exoplanet Survey Satellite observations. The program uses multiple stars of three different, well-understood types (hot stars, A dwarfs, and solar analogs) to allow for the statistical (within a type) and systematic (between types) uncertainties to be quantified. The program explicitly includes observations to calibrate every instrument mode, further vet the set of calibration stars, measure the instrumental repeatability, measure the relative calibration between subarrays and full frame, and check the relative calibration between faint and bright stars. For photometry, we have set up our calibration to directly support both the convention based on the band average flux density and the convention based on the flux density at a fixed wavelength." @default.
- W4280490032 created "2022-05-22" @default.
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- W4280490032 date "2022-05-13" @default.
- W4280490032 modified "2023-10-18" @default.
- W4280490032 title "The James Webb Space Telescope Absolute Flux Calibration. I. Program Design and Calibrator Stars" @default.
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- W4280490032 doi "https://doi.org/10.3847/1538-3881/ac66dc" @default.
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